By BECKWITH R. C.   in Environmental Entomology

ISSN:1938-2936|5|1|73-77

Entomological Society of America‎(1976)‎

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By BECKWITH R. C.   in Annals of the Entomological Society of America

ISSN:1938-2901|56|6|741-744

Entomological Society of America‎(1963)‎

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By BECKWITH R. C.   STELZER M. J.   in Annals of the Entomological Society of America

ISSN:1938-2901|72|1|158-161

Entomological Society of America‎(1979)‎

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By Beckwith R. C.   Kemp W. P.   in Forest Science

ISSN:0015-749X|30|3|743-746

Society of American Foresters‎(1984)‎

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By MASON RICHARD R.   BECKWITH R. C.   GENE PAUL H.   in Environmental Entomology

ISSN:1938-2936|6|5|623-626

Entomological Society of America‎(1977)‎

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