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310  Current Publication Frequency (NR)

Input Standards

Required if applicable/Optional
1st Indicator  Undefined
blank character Undefined
2nd Indicator  Undefined
blank character Undefined
Subfields (R=Repeatable  NR=Nonrepeatable) Input Standards
‡a Current publication frequency (NR) Mandatory/Mandatory
‡b Date of current publication frequency (NR) Required if applicable/Required if applicable


The current publication frequency of a continuing resource (serial or integrating resource).

See Freq, Regl, and field 321 for more information.

1st Indicator

Undefined. The 1st indicator position is undefined and contains a blank ( blank character ).

blank character


2nd Indicator

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

blank character



‡a Current publication frequency

A note that describes the frequency of the continuing resource. Use the following guidelines to enter information in subfield ‡a.

  • Capitalize the first letter of the first word in subfield ‡a.
  • Enter a comma between subfields ‡a and ‡b.
  • Do not enter final punctuation unless the field ends with an abbreviation.
  • If the field begins with a number and does not have field 321, spell out the number.
    310     Seven issues yearly, ‡b January 1986-
    [No field 321 is used]
  • If the record has a 310 field and one or more 321 fields, use Arabic numerals in field 310 and spell out the number in the first field 321.
    310     4 issues yearly, ‡b August 1904-
    321     Five issues yearly, ‡b 1901-June 1904
    310     Monthly, ‡b 1949-1956
    321     Five issues yearly, ‡b 1947
    321     14 issues yearly, ‡b 1948
‡b Date of current publication frequency

Date of current publication frequency. Use for dates if the beginning date of the current frequency is not the same as the beginning date of publication.

310     Monthly, ‡b 1958-
321     Bimonthly, ‡b 1954-1957
362 0   January 1954-
310     5 numbers a year, ‡b 1946-1948
321     Four numbers a year, ‡b 1931-1945
[Field 310 gives frequency when serial ceased publication]

This page last revised: September 4, 2015