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United States Department of Agriculture. "Plant Inventory, 1967, No. 168 (262679-270534)." ,

APA

United States Department of Agriculture, U. States Department of Agriculture. (0000). Plant Inventory, 1967, no. 168 (262679-270534).

Chicago

United States Department of Agriculture. "Plant Inventory, 1967, no. 168 (262679-270534)" (1967):