By Helm Ricki M.   Burks A. Wesley   in Journal of AOAC International

ISSN:1944-7922|87|6|1441-1447

AOAC International‎(2004)‎

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By Brenner Richard J.   Barnes Kathleen C.   Helm Ricki M.   Williams Larry W.   in American Entomologist

ISSN:2155-9902|37|3|143-156

Entomological Society of America‎(1991)‎

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By Yunginger John W.   Squillace Diane L.   Jones Richard T.   Helm Ricki M.   in Allergy and Asthma Proceedings

ISSN:1539-6304|10|4|249-253

OceanSide Publications, Inc‎(1989)‎

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