Insects not known to occur in the United States /
issued by Plant Pest Control Division, Agricultural Research Service, United States Department of Agriculture.
APA Citation
United States. Plant Pest Control Division. (1957). Insects not known to occur in the United States. [Washington, D.C.: Plant Pest Control Division.
MLA Citation
United States. Plant Pest Control Division. Insects Not Known to Occur In the United States. [Washington, D.C.: Plant Pest Control Division, 1957.
Warning: These citations may not always be complete (especially for serials).