Ultrasonic Extraction of Insecticides in Soil. I. Comparison of Extraction Methods and Solvent Systems Over Three Time Intervals1

Author： JOHNSEN R. E.   STARR R. I.  

Publisher： Entomological Society of America

ISSN： 1938-291X

Source： Journal of Economic Entomology, Vol.60, Iss.6, 1967-12, pp. : 1679-1682

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