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163. Phenoxathiin, promising insecticide; by Llovd E. Smith.

164. Rotenone. Review of insecticidal uses of rotcnone and rotenoids from Derris Lonchocarpus (cube and Umbo), Tephrosia, and related plants: pt. 1, Collembola, Orthoptera, Dermaptera, Odonata, Isoptera, Corrodcntia, and Mallophaga [with list of literature cited]; by R. C. Roark.