A field guide to western birds
Subtitle: field marks of all speices found in North America west of the 100th meridian, with section on the birds of the Hawaiian Islands
By: Text and illus. by Roger Tory Peterson.
Edition: 2nd edition revised and enlarged.
Series: The Peterson field guide series -- no.2.
Publisher: Houghton Mifflin
Published: 1961
Place of publication: Boston
Number of pages: 366
Subjects: Birds -- West (U.S.)