Books by Robert S. Lewis:
Books in the extended shelves:
![[X-Info]](https://onlinebooks.library.upenn.edu/infouc.gif)
Lewis, Robert S. (Robert Strong), 1882-: Descriptive bulletin of the Department of Metallurgical research, State School of Mines, University of Utah (University of Utah, State School of Mines, in co-operation with United States Bureau of Mines, 1919), also by Thomas Varley, R. H. Bradford, and Frederick Galloway Moses (page images at HathiTrust)- Lewis, Robert S. (Robert Strong), 1882-: Mine sampling and the commercial value of ores (Salt Lake City, 1918) (page images at HathiTrust)
- Lewis, Robert S. (Robert Strong), 1882-: The mineral industry of Utah (Salt Lake City, 1919), also by Hyrum Schneider and Thomas M. Varley (page images at HathiTrust)
- Lewis, Robert S. (Robert Strong), 1882-: Patents relating to oil-flotation processes (Salt Lake City, 1916), also by Oliver Caldwell Ralston (page images at HathiTrust)
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