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MLA

United States Department of Agriculture. Plant Inventory, 1922, no. 56 (46303-46587). , 1922.

APA

United States Department of Agriculture. (1922). Plant Inventory, 1922, no. 56 (46303-46587). .

Chicago

United States Department of Agriculture. Plant Inventory, 1922, no. 56 (46303-46587). , 1922.