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MLA

Cooper, M. R. (Martin Reese), and J. O. (John Oscar) Williams. Cost of using horses on corn-belt farms. U.S. Dept. of Agriculture, 1922.

APA

Cooper, M. R. (Martin Reese), and Williams, J. O. (John Oscar). (1922). Cost of using horses on corn-belt farms. U.S. Dept. of Agriculture.

Chicago

Cooper, M. R. (Martin Reese), and J. O. (John Oscar) Williams. Cost of using horses on corn-belt farms. U.S. Dept. of Agriculture, 1922.