English, B. C., & Heady, E. O. (1980). Short and long-term analysis of the impacts of several soil loss control measures on agriculture. Ames: Center for Agricultural and Rural Development. Iowa State University.
Παραπομπή Chicago StyleEnglish, Burton C., and Earl O. Heady. Short and Long-term Analysis of the Impacts of Several Soil Loss Control Measures On Agriculture. Ames: Center for Agricultural and Rural Development. Iowa State University, 1980.
Παραπομπή MLAEnglish, Burton C., and Earl O. Heady. Short and Long-term Analysis of the Impacts of Several Soil Loss Control Measures On Agriculture. Ames: Center for Agricultural and Rural Development. Iowa State University, 1980.
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