Books by Paul O. Ritcher:
Books in the extended shelves:
![[X-Info]](https://onlinebooks.library.upenn.edu/infouc.gif)
Ritcher, Paul O.: The Anomalini of eastern North America with descriptions of the larvae and a key to species (Coleoptera: Scarabaeidae) (Kentucky Agricultural Experiment Station, University of Kentucky, 1943) (page images at HathiTrust)- Ritcher, Paul O.: Control of the strawberry crown borer by methyl bromide fumigation and with poison baits (Kentucky Agricultural Experiment Station, University of Kentucky, 1944) (page images at HathiTrust)
- Ritcher, Paul O.: Dynastinae of North America : with descriptions of the larvae and keys to genera and species (Coleoptera: Scarabaeidae) (Kentucky Agricultural Experiment Station, University of Kentucky, 1944) (page images at HathiTrust)
- Ritcher, Paul O.: Oil-nicotine, a promising new insecticide (Kentucky Agricultural Experiment Station, University of Kentucky, 1937), also by R. K. Calfee (page images at HathiTrust)
Find more by Paul O. Ritcher at your library, or elsewhere.