21.28B. General rule
Excerpts from Serials:
If the item is a collection of excerpts from a serial, generally make a related work added entry for the serial only if the serial is mentioned in the chief source of information and all the items in the collection would not be entered under the same heading. If two or more serials are mentioned, make an added entry only for the latest if the titles represent a succession of changes (cf. 21.2C , 21.3B ). If the titles represent different serials, make added entries for each if there are no more than three. If four or more different serials are mentioned, generally do not make an added entry for any of them.
Serial Supplements to Other Serials:
Create a separate bibliographic record for a serial supplement to another serial if the supplement does not update that related serials and carries its own designation system that is distinct and independent from that used by the related serials. Make a linking note to the related serial. In addition, make an added entry for the related serial unless the supplement has a common title that is identical to the title proper of the related serial. On the bibliographic record for the related serial, make a linking note to the supplement.
Other serial supplements should be noted on the bibliographic records for the related serials. Give added entries for the supplements whenever the titles are distinctive.
Indexes:
On the bibliographic record for a separately cataloged index to a published work, do not make a related work added entry for the work being indexes. Instead, access to the work being indexed will be provided through a subject heading that consists of the heading for the work followed by the subdivision - Indexes.
Indexes to Serials:
Generally indicate the presence of an index to a serial on the bibliographic record for the serial being indexed (cf. 12.7B17). If, however, the index is published separately and is not issued by the entity responsible for the serial being indexed, create a separate bibliographic record (monograph or serial as appropriate) for the index. Create a separate record also whenever the index covers two or more different serials. (A serial with one or more title or main entry heading changes (cf. 21.2C, 21.3B) is regarded as one serial.)
Census Data:
If a work containing data taken from an official census (e.g., a genealogy) is not treated as an edition of the census, do not make an added entry for the census. (The necessary access is provided through one or more subject headings.)
Bible:
The Library of Congress disregards the ninth example on page 352 and the first example at the top of page 354 in the printed text of AACR2 and does not make a related work added entry for a Bible text. (Rule 25.18A requires main and added entries for Bible texts to be analytical; cf. LCRI 21.30M .)
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