The birds of Rocky Mountain National Park.
By: Illus. by Roger Tory Peterson.
Publisher: Rocky Mountain Nature Association
Published: 1950
Place of publication: Estes Park, Colo
Language: eng
Number of pages: 81
Subjects: Birds -- Colorado -- Rocky Mountain National Park.
Notes: Cover title.
First published in the Auk, July, 1945.
Bibliography: p. 75-77.