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MLA

Kalmbach, E. R. (Edwin Richard). The crow in its relation to agriculture : Is it a farm pest?. U.S. Dept. of Agriculture, 1920.

APA

Kalmbach, E. R. (Edwin Richard). (1920). The crow in its relation to agriculture : Is it a farm pest?. U.S. Dept. of Agriculture.

Chicago

Kalmbach, E. R. (Edwin Richard) The crow in its relation to agriculture : Is it a farm pest?. U.S. Dept. of Agriculture, 1920.