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MLA

Rule, Glenn K. (Glenn Kenton). Toward soil security on the northern Great plains. U.S. Dept. of Agriculture, 1941.

APA

Rule, Glenn K. (Glenn Kenton). (1941). Toward soil security on the northern Great plains. U.S. Dept. of Agriculture.

Chicago

Rule, Glenn K. (Glenn Kenton) Toward soil security on the northern Great plains. U.S. Dept. of Agriculture, 1941.