Books by R. J. Kowal:
Books in the extended shelves:
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Kowal, R. J. (R. Joseph), 1911-: Southern pine beetle (Washington, DC : United States Government Printing Office, 1966., 1966), also by United States Department of Agriculture and United States Forest Service (page images at HathiTrust)- Kowal, R. J. (R. Joseph), 1911-: Subterranean termites : their prevention and control in buildings (U.S. Dept. of Agriculture, 1960), also by R. A. St. George and H. R. Johnston (page images at HathiTrust)
Find more by R. J. Kowal at your library, or elsewhere.