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MLA

Strand, Bruce W, and United States Department of Agriculture. Economics and Statistics Service. Spatial scale of crop-yield models : a review of the relationship between scale of models and accuracy. U.S. Dept. of Agriculture, Economics and Statistics Service, Statistical Research Division, 1981.

APA

Strand, Bruce W, and United States Department of Agriculture. Economics and Statistics Service. (1981). Spatial scale of crop-yield models : a review of the relationship between scale of models and accuracy. U.S. Dept. of Agriculture, Economics and Statistics Service, Statistical Research Division.

Chicago

Strand, Bruce W., and United States Department of Agriculture. Economics and Statistics Service. Spatial scale of crop-yield models : a review of the relationship between scale of models and accuracy. U.S. Dept. of Agriculture, Economics and Statistics Service, Statistical Research Division, 1981.