By Fedde Gerhard F.   in Journal of Forestry

ISSN:0022-1201|62|2|102-106

Society of American Foresters‎(1964)‎

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By FEDDE GERHARD F.   in Annals of the Entomological Society of America

ISSN:1938-2901|64|3|749-750

Entomological Society of America‎(1971)‎

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