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MLA

United States, Agricultural Research Service, and Crops Research Division. "Suggested Guide for Weed Control 1969." , 70. Print

APA

United States, U. States, Agricultural Research Service, A. Research Service, & Crops Research Division, C. Research Division. (1969). Suggested guide for weed control 1969.

Chicago

United States, Agricultural Research Service, and Crops Research Division. "Suggested guide for weed control 1969" (0000): 70.