By Rickard W. H.   in Journal of Forestry

ISSN:0022-1201|69|3|158-160

Society of American Foresters‎(1971)‎

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By ROGERS L. E.   RICKARD W. H.   in Annals of the Entomological Society of America

ISSN:1938-2901|68|6|1069-1070

Entomological Society of America‎(1975)‎

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