Search results for: Duda, John R.

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    Basic estimated capital investment and operating costs for underground bituminous coal mines utilizing a continuous mining system : mines with annual production of 1.188 and 2.376...

    Authors: Duda, John R.
    Published: Department of Energy ; [for sale by the National Technical Information Service], 1978
    Physical Description: ii, 32 pages : illustrations ; 28 cm.
    Government Document Microfilm Book