A Reconnaissance for selected herbicides, metabolites, and nutrients in streams of nine Midwestern States, 1994-95 / by Elisabeth A. Scribner ... [et al.] ; prepared in cooperation with the U.S. Environmental Protection Agency.
Imprint
Lawrence, Kan. : U.S. Dept. of the Interior, U.S. Geological Survey ; Denver, CO : Information Services [distributor], 1998.