Books by Lathrop E. Roberts:
Books in the extended shelves:
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Roberts, Lathrop E. (Lathrop Emerson), 1881-: Determination of magnetite in copper slags (U.S. Dept. of the Interior, Bureau of Mines, 1931), also by R. L. Nugent and United States Bureau of Mines (page images at HathiTrust)
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