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A comparative study of the toxicity of malathion and malathion plus piperonyl butoxide by topical application on the German cockroach, Blattella germanica (L.), and the Madera cockroach, Leucopheae maderae (F.)Craig, James Galahad Othman. January 1956 (has links)
Call number: LD2668 .T4 1956 C73 / Master of Science
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