Occurrence and transport of agricultural chemicals in the Mississippi River basin, July through August 1993 /
Goolsby, D. A.
Battaglin, William A.
Thurman, E. M.(Earl Michael),1946-
[Washington] : U.S. G.P.O. ; Denver, CO : Free on application to the U.S. Geological Survey, Map Distribution,
1993.
Title on p. [4] of cover: Occurrence and transport, agricultural chemicals, Mississippi River basin, July through August, 1993.
Includes bibliographical references (p. 21-22).
Agricultural chemicals
Water