Concise AACR2:  26. Collections of works by different persons or bodies

Apply this rule to:

1. collections of independent works, or extracts from individual works, by different persons or bodies (for example, anthologies)
2. works consisting partly of independent works and partly of contributions by different persons or bodies.

Do not apply his rule to works covered by rule 23B2 (for example, conference proceedings).

If a bibliographic resource belongs to one of the types listed in rule 26A and has its own collective title, enter it under that title.

If the resource has one, two, or three editors or compilers named in the chief source of information, make added entries under the headings for each of them. If there are four or more editors or compilers named in the chief source of information, make an added entry under the heading for the one named first.

If a bibliographic resource belongs to one of the types listed in rule 26A and has no collective title, enter it under the heading for the first work named in the chief source of information. If the resource lacks a chief source of information, enter it under the heading for the first work in the item.

Make added entries under the headings for editors,compilers, and/or contributors as instructed in rule 26B.

Make an analytical added entry (see 29B8) for each of the works in such a resource.