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MLA

United States Department of Agriculture. Plant Inventory, 1929, no. 90 (70868-73049). , 1929.

APA

United States Department of Agriculture. (1929). Plant Inventory, 1929, no. 90 (70868-73049). .

Chicago

United States Department of Agriculture. Plant Inventory, 1929, no. 90 (70868-73049). , 1929.