Trends of Western Spruce Budworm1 and Associated Insects in Pacific Northwest Forests Sprayed with DDT2,3

Author： CAROLIN V. M.   COULTER W. K.  

Publisher： Entomological Society of America

ISSN： 1938-291X

Source： Journal of Economic Entomology, Vol.64, Iss.1, 1971-02, pp. : 291-297

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