29B1.
Two or more persons or
corporate bodies involved.
If the following subrules and examples refer to
only one person or body, and two or three persons or bodies are
involved in the work that you are cataloguing, make added entries
under the headings for each.
If four or more persons or bodies are involved
in a particular instance, make an added entry under the heading for
the one named first in the chief source of information of the
bibliographic resource being catalogued.
