Search Results - Bolmer, Robert L.

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    Stresses induced around mine development workings by undercutting and caving, climax molybdenum mining, Colorado (in two parts). by Bolmer, Robert L.

    Published 1965
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    Government Document Book

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    Raising with a suspended work cage at the Irene Shaft, Leadville, Colo. / by Bolmer, Robert L.

    Published 1958
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