Occurrence and transport of agricultural chemicals in the Mississippi River basin, July through August 1993 - Goolsby, Donald A.; Battaglin, William A.; Thurman, E. M. (Earl Michael) 1946- (Denver, Colorado U.S. Geological Survey, Map Distribution, 1993)
Title on page [4] of cover: Occurrence and transport, agricultural chemicals, Mississippi River basin, July through August, 1993.
Includes bibliographical references (pages 21-22).
Keywords: Agricultural chemicals -- Environmental aspects -- Mississippi River Watershed; Water -- Pollution -- Mississippi River Watershed