12.3C1. Numeric and/or Alphabetic, Chronological, or other Designation Area [Footnote]
Choosing the Chronological Designation:
When choosing the chronological designation, consider the type of date(s) given on the item. The chronological designation may represent the approximate time of publication (e.g., the May 1990 issue of a monthly), the coverage of the contents (e.g., fiscal year 1990), or the date of a meeting or event. An identifying date that reflects the publishing of the serial may be used as a chronological designation when there is no numeric designation to identify each issue and the publication is more likely to bear a formal chronological designation on subsequent issues (e.g., a directory). (For other types of publications, apply 12.3D and supply "no. 1" in brackets.)
If more than one expression of a chronological designation is given, prefer to use the one that provides the clearest indication of the period covered by the contents (if such a determination is possible). (See also LCRI 12.3 .)
Multiple Dates:
When the chronological designation consists of multiple dates, each of which is associated with a different aspect of the title (e.g., 1990 report and 1991 forecast), use the first date as the chronological designation and make a note explaining the second date.
Recording a Chronological Designation When a Date Serves as the Volume Number:
When a date, or portion of the date, is recorded as the numeric designation, record a chronological designation only when a separate complete date appears on the publication.
See also:
12.3C. Chronological designation
