Schatzer, R. J., Roberts, R. K., & Heady, E. O. (1981). Alternative futures in U.S. farm size structure, productivity, exports and income: A simulation. Ames, Iowa: Center for Agricultural and Rural Development. Iowa State University.
Παραπομπή Chicago StyleSchatzer, Raymond Joe, Roland K. Roberts, and Earl Orel Heady. Alternative Futures in U.S. Farm Size Structure, Productivity, Exports and Income: A Simulation. Ames, Iowa: Center for Agricultural and Rural Development. Iowa State University, 1981.
Παραπομπή MLASchatzer, Raymond Joe, Roland K. Roberts, and Earl Orel Heady. Alternative Futures in U.S. Farm Size Structure, Productivity, Exports and Income: A Simulation. Ames, Iowa: Center for Agricultural and Rural Development. Iowa State University, 1981.