North American breeding bird survey
Subtitle: annual summary, 1989
By: by Sam Droege and John R. Sauer.
Contributors: Sauer, John R.
Series: Biological report -- 90(8); Biological report (Washington, D.C.) -- 90-8.
Publisher: U.S. Dept. of the Interior, Fish and Wildlife Service
Published: 1990
Place of publication: Washington, DC
Language: eng
Number of pages: 22
Subjects: Bird populations -- United States.; Bird populations -- Canada.; Birds -- United States -- Geographical distribution.; Birds -- Canada -- Geographical distribution.
Notes: "August 1990."

Includes bibliographical references (p. 7).