Books by John Roy Thoenen:
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Thoenen, John Roy, 1886-: Flake-Graphite and Vanadium Investigation In Clay, Coosa, and Chilton Counties, Ala. (Bureau of Mines Report of Investigations #4366, 1948), also by Hugh D. Pallister (page images at HathiTrust)
Additional books by John Roy Thoenen in the extended shelves:
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Thoenen, John Roy, 1886-: Bauxite resources of the United States (U.S. Dept. of the Interior, Bureau of Mines, 1941), also by Ernest F. Burchard (page images at HathiTrust)- Thoenen, John Roy, 1886-: Economics of new sand and gravel developments (U.S. Govt. Print. Off., 1929) (page images at HathiTrust)
- Thoenen, John Roy, 1886-: Mineral wool (Washington, D.C. : United States, Department of Commerce, Bureau of Mines, 1929., 1929), also by United States Bureau of Mines (page images at HathiTrust)
- Thoenen, John Roy, 1886-: Tabular index of Bureau of Mines Information Circulars on mining and milling methods (U.S. Dept. of the Interior, Bureau of Mines, 1935) (page images at HathiTrust)
- Thoenen, John Roy, 1886-: Underground limestone mining (Govt. print off., 1926) (page images at HathiTrust)
Find more by John Roy Thoenen at your library, or elsewhere.