Nonpoint source control guidance :
agricultural activities /
Robert E. Thronson.

APA Citation

Thronson, R. E., United States. Environmental Protection Agency. Water Planning Division. (1978). Nonpoint source control guidance: agricultural activities. Washington: Water Planning Division, Office of Water Planning and Standards, U.S. Environmental Protection Agency.

MLA Citation

Thronson, Robert E, and United States. Environmental Protection Agency. Water Planning Division. Nonpoint Source Control Guidance: Agricultural Activities. Washington: Water Planning Division, Office of Water Planning and Standards, U.S. Environmental Protection Agency, 1978.