Agricultural chemicals in ground and surface water in a small watershed in Clayton County, Iowa, 1988-91 /
by Stephen J. Kalkhoff and Bryan D. Schaap ; prepared in cooperation with Iowa Department of Natural Resources (Geological Survey Bureau).

APA Citation

Kalkhoff, S. J., Schaap, B. D., Geological Survey (U.S.)., Iowa. Department of Natural Resources. Geological Survey Bureau. (1996). Agricultural chemicals in ground and surface water in a small watershed in Clayton County, Iowa, 1988-91. Iowa City, Iowa: U.S. Dept. of the Interior, U.S. Geological Survey .

MLA Citation

Kalkhoff, Stephen J, Bryan D Schaap, Geological Survey (U.S.), and Iowa. Department of Natural Resources. Geological Survey Bureau. Agricultural Chemicals In Ground And Surface Water In a Small Watershed In Clayton County, Iowa, 1988-91. Iowa City, Iowa: U.S. Dept. of the Interior, U.S. Geological Survey , 1996.