separate and independent works in themselves are assembled into a
collective whole. Examples of collective works include periodicals (such
as magazines and journals), encyclopedias, and anthologies.

A single copyright notice applicable to the collective work as a whole
serves to indicate protection for all the contributions in the
collective work, except for advertisements, regardless of the ownership
of copyright in the individual contributions and whether they have been
published previously.

However, a separate contribution to a collective work may bear its own
notice of copyright, and in some cases, it may be advantageous to
utilize the separate notice. As a practical matter, a separate notice
will inform the public of the identity of the owner of the contribution.
For works first published before March 1, 1989, there may be additional
reasons to use a separate notice. If the owner of the collective work is
not the same as the owner of an individual contribution that does not
bear its own notice, the contribution is considered to bear an erroneous
notice. (For the effects of a notice with the wrong name, see "Error in
Name" on page 5 of this circular.) Additionally, if an individual author
of contributions to a periodical wishes to make a single registration
for a group of contributions published within a 12-month period, each
contribution must carry its own notice. For information on this type of
registration, request Form GR/CP and Information Package 104.

A notice for the collective work will not serve as the notice for
advertisements inserted on behalf of persons other than the copyright
owner of the collective work. These advertisements should each bear a
separate notice in the name of the copyright owner of the advertisement.