Books by Ruric Creegan Roark:
Books in the extended shelves:
![[X-Info]](https://onlinebooks.library.upenn.edu/infouc.gif)
Roark, Ruric Creegan, 1887-: Bibliography of chloropicrin, 1932-1934 ... ([Washington, 1935), also by Ruth Busbey and United States. Bureau of Entomology and Plant Quarantine (page images at HathiTrust)- Roark, Ruric Creegan, 1887-: Excerpts from consular correspondence relating to insecticidal and fish-poison plants ([Washington], 1931) (page images at HathiTrust)
- Roark, Ruric Creegan, 1887-: A second index of patented mothproofing materials (U.S. Dept. of Agriculture, Bureau of Entomology and Plant Quarantine, Division of Insecticide Investigations, 1936) (page images at HathiTrust)
- Roark, Ruric Creegan, 1887-: A third index of patented mothproofing materials (U.S. Dept. of Agriculture, Bureau of Entomology and Plant Quarantine, Division of Insecticide Investigations, 1936), also by Ruth Lawless Busbey (page images at HathiTrust)
Find more by Ruric Creegan Roark at your library, or elsewhere.