Search Results - Plein, L.N

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  1. 1
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    A study of falls of roof and coal in mines in the No. 8 Field of eastern Ohio / by Paul, J. W. (James Washington)

    Published 1931
    Other Authors: “…Plein, L. N.…”
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  2. 2
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    Minerals Yearbook, 1936. Compiled under the supervision of O.E. Kiessling and H.H. Hughes, Mineral Resources and Economics Division.

    Published 1937
    Other Authors: “…Plein, L.N…”
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  3. 3
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    Minerals Yearbook, 1937. Compiled under the supervision of H.H. Hughes, Economics and Statistics Branch.

    Published 1937
    Other Authors: “…Plein, L.N…”
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  4. 4
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    Minerals Yearbook, 1935. Compiled under the supervision of O.E. Kiessling, chief economist, Mineral Resources and Economics Division.

    Published 1936
    Other Authors: “…Plein, L. N.…”
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