Evaluation of an index of biotic integrity
Subtitle: temporal variability and regional application in the midwest
By: James R. Karr ... [et al.]
Contributors: Karr, James R; Corvallis Environmental Research Laboratory
Publisher: U.S. Environmental Protection Agency, Environmental Research Laboratory; Center for Environmental Research Information [distributor]
Published: 1984
Place of publication: Corvallis, OR; Cincinnati, OH
Language: eng
Subjects: Biotic communities -- Environmental aspects -- United States
Notes: Caption title

At head of title: Environmental research brief

"Mar. 1984."

"EPA-600/D-84-053."

Bibliography: p. 7