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Kleff, J. M. Drainage tunnel would restore prosperity here / by J.M. Kleff.
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Colorado School of Mines, Arthur Lakes Library |
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Kleff, J. M. [Turquoise Lake area map] / June 21-1921, by J.M. Kleff.
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Colorado School of Mines, Arthur Lakes Library |
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Kleff, J. M. Mineral survey no. 20783, Colorado Land District : field notes of the survey of the mining claim of American Smelting and Refining Company / by J.M. Kleff.
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Colorado School of Mines, Arthur Lakes Library |
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Kleff, J. M. [Papers].
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Colorado School of Mines, Arthur Lakes Library |
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creatorOf |
Kleff, J. M. West End Mine : Colusa County, Calif. / map no. 2 with report by J.M. Kleff.
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Colorado School of Mines, Arthur Lakes Library |
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creatorOf |
Kleff, J. M. Field notes of the survey of the mining claim of the Inez Mining Company known as the Bull Dog lode, Independent mining district, Lake County, Colorado, suspended T. 9 S., R. 81 W. of the 6th P.M., section 19, township 9 south, range 80 west, and surveyed under instructions dated, July 29, 1920 / by J. M. Kleff.
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Colorado School of Mines, Arthur Lakes Library |
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creatorOf |
Kleff, J. M. Original location, proposed amendments [map of area in Summit County].
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Colorado School of Mines, Arthur Lakes Library |
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