ECOLOGY OF TOXOPTERA GRAMINUM, ESPECIALLY AS TO FACTORS AFFECTING IMPORTANCE IN THE NORTHERN UNITED STATES.

Author： WADLEY F. M.  

Publisher： Entomological Society of America

ISSN： 1938-2901

Source： Annals of the Entomological Society of America, Vol.24, Iss.2, 1931-06, pp. : 325-395

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