By Powell Robert D.   in Journal of the American Helicopter Society

ISSN:2161-6027|6|4|27-32

AHS International‎(1961)‎

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By DUFFEY JAMES E.   POWELL ROBERT D.   in Annals of the Entomological Society of America

ISSN:1938-2901|72|5|599-601

Entomological Society of America‎(1979)‎

Access to resources Favorite 9.664626