Christensen, D. A. (1981). The effects of increased energy prices on U.S. agriculture: An econometric approach. Ames, Iowa: Center for Agricultural and Rural Development. Iowa State University.
Παραπομπή Chicago StyleChristensen, Douglas A. The Effects of Increased Energy Prices On U.S. Agriculture: An Econometric Approach. Ames, Iowa: Center for Agricultural and Rural Development. Iowa State University, 1981.
Παραπομπή MLAChristensen, Douglas A. The Effects of Increased Energy Prices On U.S. Agriculture: An Econometric Approach. Ames, Iowa: Center for Agricultural and Rural Development. Iowa State University, 1981.
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