The proceedings of the Delaware Valley Ornithological Society, published
under the title _Cassinia_, contain a wealth of material interesting to
the Pennsylvania student. _The Cardinal_, journal of the Audubon Society
of the Sewickley Valley, and a well-edited periodical, contains articles
of interest chiefly to workers in western Pennsylvania; _The Auk_, _The
Wilson Bulletin_, _Bird-Lore_, _The Oologist_, _The Condor_ (western),
and _Nature Magazine_, all are likely to contain articles of interest to
Pennsylvania bird students.