5xx Fields

Contents   Fixed field   Access points   0xx   1xx   2xx   3xx   4xx   5xx   6xx   7xx   8xx   9xx   Control subfields

510  Citation/References Note (R)

Record Type


Input Standards

Field (Full/Minimal)
1st Indicator  Coverage/location in a source
0 Coverage unknown
1 Coverage complete
2 Coverage is selective
3 Location in source not given
4 Location in source given
2nd Indicator  Undefined
blank character Undefined
Subfields (R=Repeatable  NR=Nonrepeatable) Input Standards (Full/Minimal)
ǂa Name of source (NR) Mandatory/Mandatory
ǂb Coverage of source (NR) Required if applicable/Required if applicable
ǂc Location within source (NR) Required if applicable/Required if applicable
ǂu Uniform Resource Identifier (R) Optional/Optional
ǂx International Standard Serial Number (NR) Required if applicable/Optional
ǂ3 Materials specified (NR) Optional/Optional
ǂ6 Linkage (NR) System supplied/System supplied
ǂ7 Data provenance (R) Optional/Optional
ǂ8 Field link and sequence number (R) Optional/Optional


A note that gives citations or references to published bibliographic descriptions or reviews of an item. Use to specify where an item has been abstracted, cited, indexed, or reviewed.

Use field 510 for citations or references in a brief form (e.g., using generally recognizable abbreviations). Use field 520 for the actual text of a published description.

Use a separate 510 field for each title when the title of the source of the index, abstract, review, etc., changes. When coverage changes, thus requiring a different value in the 1st indicator, add a new 510 field with appropriate dates to the record. Repeat field 510 also for multiple source citations.

Use field 510 when the indexing and/or review is external to the item represented by the bibliographic record. Use field 555 when an index is an integral part of the item.

For information on punctuation, see the Punctuation section below.


For serials, regardless of format, use to specify publications in which a serial has been indexed and/or abstracted and the dates of coverage, if known. The indexing and abstracting services referenced are primarily those issued for serials. However, use also for certain monographic titles, particularly those that are standard reference tools in a subject area or that cover periods of time not included in continuing publications.

In 1984-1985 CONSER conducted a project adding citations for abstracting and indexing publications in field 510 in serial records. In 2002 CONSER requested that most of those citations be removed based on the recognition that abstracting and indexing data was available from other sources and that the data was frequently out-of-date in bibliographic records. Note: OCLC recommends that catalogers generally omit field 510 for abstracting and indexing citations from WorldCat records for serial publications.


For books and music, use for references to published descriptions of the item (e.g., descriptions of rare materials recorded in a brief, standardized format) or reviews (e.g., reviews in professional literature).


For mixed materials, use for references to publications in which abstracts, citations, descriptions, or indexes of the described materials have appeared.


For unpublished visual materials or graphic items collectively controlled, use for references to published descriptions of the work or collection. Use also for citations to reviews of projected visual materials.

1st Indicator

Coverage/location in a source. Whether or not the field identifies the specific location of the citation. For serials, use the value in the 1st indicator to indicate the type of coverage given the item by the abstracting and indexing service. The 1st indicator controls the generation of the display constant preceding the note.


Coverage unknown. The coverage is unspecified. Use to generate the display constant Indexed by:.

510 0   Reader's guide to periodical literature

Coverage complete. The abstracting and indexing coverage includes references to all articles in a journal and/or all issues within each volume and is considered to provide complete coverage. Use to generate the display constant Indexed in its entirety by:.

510 1   Education index, ǂx 0013-1385, ǂb 1966-

Coverage is selective. The indexing and abstracting service does not include references to all articles in the periodical. Use to generate the display constant Indexed selectively by:.

510 2   Moving picture world, ǂb 1975-

Location in source not given. The specific location (e.g., page number or volume) of a citation within the source is not given. Use to generate the display constant References:.

510 3   LC Civil War maps

Location in source given. The specific location (e.g., page number or volume) of a citation within the source is given. Use to generate the display constant References:.

510 4   Algae abstracts, ǂc v. 3, W73-11952
510 4   Case, A.E. Poetical miscellanies, ǂc 440, 1b, 2c, 3b, 4-6
[A note for a rare serial that has been cited in a bibliography]

Note: Group multiple 510 fields of like indicators together.

2nd Indicator

Undefined. The 2nd indicator position is undefined and contains a blank.

blank character



ǂa Name of source

The name of the source in which the reference or citation appears. Give the name of the source either in full cataloging form or as a conventionalized abbreviation. Prefer use of established forms of citations of bibliographies and catalogs when cataloging rare materials as found in Standard Citation Forms for Rare Materials Cataloging.

510 3   Bibliographie cartographique internationale
510 4   TV guide (Philadelphia), ǂc 112181, p. 48

Subfield ǂa contains the title of a source (e.g., Index medicus), but not the name of a company or organization (e.g., National Library of Medicine). Use the key title when available. If there is no print publication, use the commonly used form of name for the online database. In cases where both a print publication and an online database exist, the name from the print form of the publication is preferred.

510 0   Industrial arts index
510 3   School library journal, June 1994
[This note is a reference to a review of a bibliographic item]
ǂb Coverage of source

The dates and/or volume designations of the serial with which the service began and ended coverage.

510 1   Index medicus, ǂx 0019-3879, ǂb v1n1, 1984-
510 1   Nexis, ǂb Jan. 13, 1975-
ǂc Location within source

The specific location of the citation or reference within the source (e.g., item number or page number). When subfield ǂc is present, the 1st indicator value is 4.

510 4   Anna B. Kuster Welty, No. 5601 / by Dorothy M. Schullian. In Journal of the history of medicine and allied science, ǂc 2 (1947) : 262-265
510 4   BM XV cent., ǂc II, p. 346 (IB.5874)
510 4   LC Treasure maps (2nd ed.), ǂc 13
510 4   Schramm, ǂc v. 4, no. 48, p.10, 50, and iii
ǂu Uniform Resource Identifier

For information about subfield ǂu, see Control Subfields. If subfield ǂu provides access to the electronic bibliography cited, subfield ǂu follows subfield ǂa. If subfield ǂu provides access to the citation within an electronic bibliography, subfield ǂu follows subfield ǂc.

245 0 3 An abstract of the remarkable passages in the life of a private gentleman
510 4   Evans ǂu http://lccn.loc.gov/67004309 ǂc 5375
[The 510 subfield ǂu contains the Permalink identifier for the record describing Charles Evans's American bibliography]
100 0   Abraham à Sancta Clara, ǂd 1644-1709, ǂe author
245 1 3 Judas der Ertz-Schelm, für ehrliche Leuth, ...
510 4   VD 17 ǂc 12:196157F ǂu http://gso.gbv.de/DB=1.28/SET=5/TTL=11/COLMODE=1/CMD?ACT=SRCHA&IKT=8002&SRT=YOP &TRM= 12%3A196157F&REC=*
[The 510 subfield ǂu contains a persistent URL to the record for Abraham's Judas der Ertz-Schelm in the Verzeichnis der im deutschen Sprachraum erschienenen Drucke des 17. Jahrhunderts (VD 17) database]
245 0 0 JAMA : ǂb the journal of the American Medical Association
510 1   PubMed ǂu http://www.ncbi.nlm.nih.gov/pubmed ǂb v187n13,Mar.28 1964-
[The 510 subfield ǂu contains a URL for the bibliographic information database where the serial is cited]
ǂx International Standard Serial Number

For information about subfield ǂx, see Control Subfields.

510 0   Book review index, ǂx 0524-0581
ǂ3 Materials specified

For information about subfield ǂ3, see Control Subfields.

510 4   ǂ3 31911 Arctic field notebook ǂa Day, Harold. Statistical methods for population transport estimation. In Journal of ecological studies, ǂc vol. 7, 1974, p. 187
ǂ6 Linkage

Data that link fields when non-Latin script is entered. This subfield is system supplied and does not appear in OCLC online displays. Do not manually add subfield ǂ6. For more information about subfield ǂ6, see Control Subfields.

ǂ7 Data provenance

For information about subfield ǂ7, see Data Provenance Subfields.

ǂ8 Field link and sequence number

For information about subfield ǂ8, see Control Subfields.


For records containing punctuation, follow these instructions:

  • Optionally, follow an initial subfield ǂ3 by a colon-space or a space-colon-space if following an open date
  • Precede subfields ǂb, ǂc, and ǂx by a comma-space
  • Include incidental punctuation needed within any subfields, e.g., commas, periods (following abbreviations or initials), etc.
  • Omit the terminal period at the end of the field unless the last word is an abbreviation or initial
510 4   Sabin, J. Dictionary of books relating to America from its discovery to the present time, ǂc 78559

For records containing minimal or no punctuation, include incidental punctuation needed within any subfields. Otherwise, omit the punctuation outlined above.

510 4   Sabin, J. Dictionary of books relating to America from its discovery to the present time ǂc 78559

For more information on punctuation, including OCLC policy, see section 2.8, Punctuation.


For more information, including content designator history, see MARC 21 Format for Bibliographic Data, field 510.

This page last revised: October 13, 2022