By Butt F. H.   in Entomological Society of America. Bulletin

ISSN:0013-8754|11|2|97-98

Entomological Society of America‎(1965)‎

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By BUTT F. H.   in Annals of the Entomological Society of America

ISSN:1938-2901|29|1|1-14

Entomological Society of America‎(1936)‎

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By BUTT F. H.   in Annals of the Entomological Society of America

ISSN:1938-2901|27|4|565-579

Entomological Society of America‎(1934)‎

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By BUTT F. H.   in Annals of the Entomological Society of America

ISSN:1938-2901|30|3|487-491

Entomological Society of America‎(1937)‎

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