By Welch H. E.   in Entomological Society of America. Bulletin

ISSN:0013-8754|23|2|149-149

Entomological Society of America‎(1977)‎

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By WELCH H. E.   in Annals of the Entomological Society of America

ISSN:1938-2901|55|5|535-542

Entomological Society of America‎(1962)‎

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By Welch H.E.   in Nematologica

ISSN:1875-2926|5|2|92-97

Brill‎(1960)‎

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