Books by Lois A. Conley:
Books in the extended shelves:
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Conley, Lois A.: Bibliography of investment costs, operating costs, and related economic information for the mineral industries, January-December 1976 (U.S. Dept. of the Interior, Bureau of Mines :, 1977), also by Joseph D. Sabatini and United States Bureau of Mines (page images at HathiTrust)- Conley, Lois A.: Bibliography of investment costs, operating costs, and related economic information for the mineral industries, January-December 1975 (U.S. Dept. of the Interior, Bureau of Mines :, 1976), also by Joseph Sabatini and United States Bureau of Mines (page images at HathiTrust)
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