United States. Bureau of Entomology and Plant Quarantine. (1936). Biology of primary screw worm fly, Cochliomyia americana, and comparison of its stages with those of C. macellaria. [s.n.].
Chicago Style (17th ed.) CitationUnited States. Bureau of Entomology and Plant Quarantine. Biology of Primary Screw Worm Fly, Cochliomyia Americana, and Comparison of Its Stages with Those of C. Macellaria. [Washington]: [s.n.], 1936.
MLA (9th ed.) CitationUnited States. Bureau of Entomology and Plant Quarantine. Biology of Primary Screw Worm Fly, Cochliomyia Americana, and Comparison of Its Stages with Those of C. Macellaria. [s.n.], 1936.
Warning: These citations may not always be 100% accurate.