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.
