Fowler, J. M., Heady, E. O., & Christensen, D. A. (1983). Interface of forest and agriculture in nonpoint pollution control. Ames: Center for Agricultural and Rural Development. Iowa State University.
Παραπομπή Chicago StyleFowler, John M., Earl O. Heady, and Douglas A. Christensen. Interface of Forest and Agriculture in Nonpoint Pollution Control. Ames: Center for Agricultural and Rural Development. Iowa State University, 1983.
Παραπομπή MLAFowler, John M., Earl O. Heady, and Douglas A. Christensen. Interface of Forest and Agriculture in Nonpoint Pollution Control. Ames: Center for Agricultural and Rural Development. Iowa State University, 1983.
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