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MLA

Ball, Carleton R. (Carleton Roy), and J. Allen (Jacob Allen) Clark. Marquis wheat. U.S. Dept. of Agriculture, 1916.

APA

Ball, Carleton R. (Carleton Roy), and Clark, J. Allen (Jacob Allen). (1916). Marquis wheat. U.S. Dept. of Agriculture.

Chicago

Ball, Carleton R. (Carleton Roy), and J. Allen (Jacob Allen) Clark. Marquis wheat. U.S. Dept. of Agriculture, 1916.