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MLA

Howard, George E. Ducks and geese : standard breeds and management . U.S. Dept. of Agriculture, 1897.

APA

Howard, George E. (1897). Ducks and geese : standard breeds and management. U.S. Dept. of Agriculture.

Chicago

Howard, George E. Ducks and geese : standard breeds and management . U.S. Dept. of Agriculture, 1897.