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Title: The history of the use of derris as an insecticide : part II, the period 1919-1928 / by R.C. Roark.
Author: Roark, R. C. ; United States Dept. of Agriculture Bureau of Entomology.
Year: 1939.
Description: 79 p. ; 27 cm.
Subject: Rotenone.
Type: Book
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1 On Shelf Storage 632.951 ROA [Q]