Showing 1 - 4 of 4 for search: 'Rodriguez, Ernest R.', query time: 0.08s
by Rodriguez, Ernest R.
Published: U.S. Dept. of the Interior, Bureau of Mines, 1951
Description: ii, 30 pages : illustrations ; 27 cm.
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by Rodriguez, Ernest R.
Published: [publisher not identified], 1956
Description: 23 pages : illustrations ; 27 cm.
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by Look, Allen D.
Published: U.S. Dept. of the Interior, Bureau of Mines, 1951
Description: 4 pages, 7 unnumbered leaves of plates : illustrations ; 27 cm.
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by Look, Allen D.
Published: U.S. Dept. of the Interior, Bureau of Mines, 1950
Description: 19 pages : illustrations ; 27 cm.
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Mine safety Copper mines and mining Safety measures Hoisting machinery Mineral industries Safety measures Ore-dressing Safety measures