Roberts, R. K., & Heady, E. O. (1979). A five-commodity econometric simulation model of the U.S. Livestock and poultry sector. Ames: Center for Agricultural and Rural Development. Iowa State University.
Παραπομπή Chicago StyleRoberts, Roland K., and Earl O. Heady. A Five-commodity Econometric Simulation Model of the U.S. Livestock and Poultry Sector. Ames: Center for Agricultural and Rural Development. Iowa State University, 1979.
Παραπομπή MLARoberts, Roland K., and Earl O. Heady. A Five-commodity Econometric Simulation Model of the U.S. Livestock and Poultry Sector. Ames: Center for Agricultural and Rural Development. Iowa State University, 1979.
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