United States. Bureau of Entomology and Plant Quarantine. (1936). Method of evaluating relative efficiency of insecticides used in field tests against tobacco hornworms. [s.n.].
Chicago Style (17th ed.) CitationUnited States. Bureau of Entomology and Plant Quarantine. Method of Evaluating Relative Efficiency of Insecticides Used in Field Tests Against Tobacco Hornworms. [Washington]: [s.n.], 1936.
MLA (9th ed.) CitationUnited States. Bureau of Entomology and Plant Quarantine. Method of Evaluating Relative Efficiency of Insecticides Used in Field Tests Against Tobacco Hornworms. [s.n.], 1936.
Warning: These citations may not always be 100% accurate.