Environmental evaluations using birds and their habitats
By: Jean W. Graber, Richard R. Graber.
Contributors: Graber, Richard Rex.; Illinois. Natural History Survey Division.
Series: Biological notes -- no. 97
Publisher: State of Illinois, Dept. of Registration and Education, Natural History Survey Division
Published: 1976
Place of publication: Urbana, Ill
Language: eng
Number of pages: 39
Subjects: Environmental indicators; Birds -- Illinois; Biotic communities -- Illinois
Notes: Cover title.

"May 1976."

Includes bibliographical references (p. 38-39).