Search Results - Ridgway, Robert H.

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  1. 1
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    Mineral economics series. by Ridgway, Robert H. (Robert Henderson)

    Published 1938
    Government Document Book

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  2. 2
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    Pyrites : general information / by Ridgway, Robert H. (Robert Henderson)

    Published 1931
    Search for the full-text version of this title in HathiTrust
    Government Document Book

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  3. 3
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    Shifts in sources of chromite supply / by Ridgway, Robert H. (Robert Henderson)

    Published 1936
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    Government Document Book

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  4. 4
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    Manganese : general Information / by Ridgway, Robert H. (Robert Henderson)

    Published 1933
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  5. 5
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    Sulphur : general information / by Ridgway, Robert H. (Robert Henderson)

    Published 1930
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  6. 6
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    Sulphur general information.

    Published 1930
    Other Authors: “…Ridgway, Robert H. (Robert Henderson)…”
    Government Document Microfilm Book

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  7. 7
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    Summarized data of gold production

    Published 1929
    Other Authors: “…Ridgway, Robert H. (Robert Henderson)…”
    Microfilm Book

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  8. 8
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    Pyrites : general information.

    Published 1931
    Other Authors: “…Ridgway, Robert H. (Robert Henderson)…”
    Full Text (via ProQuest)
    Government Document eBook

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  9. 9
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    Sulphur : general information.

    Published 1930
    Other Authors: “…Ridgway, Robert H. (Robert Henderson)…”
    Full Text (via ProQuest)
    Government Document eBook

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  10. 10
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    Summarized data of gold production.

    Published 1929
    Other Authors: “…Ridgway, Robert H. (Robert Henderson)…”
    Full Text (via ProQuest)
    eBook

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  11. 11
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    Mineral economic series.

    Published 1937
    Other Authors: “…Ridgway, Robert H. (Robert Henderson)…”
    Search for the full-text version of this title in HathiTrust
    Government Document Book

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  12. 12
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    Mineral Resources of the United States, 1929, [by] O.E. Kiessling, chief economist, Division of Mineral Statistics. Part II. -- Nonmetals.

    Published 1931
    Other Authors: “…Ridgway, Robert H.…”
    Online Access
    Government Document Electronic eBook

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  13. 13
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    Mineral Resources of the United States, 1930, [by] O.E. Kiessling, chief economist, Division of Mineral Statistics. Part I. -- Metals.

    Published 1932
    Other Authors: “…Ridgway, Robert H.…”
    Online Access
    Government Document Electronic eBook

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  14. 14
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    Mineral Resources of the United States, 1931. O.E. Kiessling, chief economist, Division of Mineral Statistics. Part I. -- Metals.

    Published 1933
    Other Authors: “…Ridgway, Robert H.…”
    Online Access
    Government Document Electronic eBook

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  15. 15
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    Mineral Resources of the United States, 1928, [by] Frank J. Katz, chief engineer, Division of Mineral Statistics. Part II. -- Nonmetals.

    Published 1930
    Other Authors: “…Ridgway, Robert H.…”
    Online Access
    Government Document Electronic eBook

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  16. 16
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    Mineral Resources of the United States, 1931. O.E. Kiessling, chief economist, Division of Mineral Statistics. Part II. -- Nonmetals.

    Published 1933
    Other Authors: “…Ridgway, Robert H.…”
    Online Access
    Government Document Electronic eBook

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  17. 17
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    Mineral Resources of the United States, 1930, [by] O.E. Kiessling, chief economist, Division of Mineral Statistics. Part II. -- Nonmetals.

    Published 1932
    Other Authors: “…Ridgway, Robert H.…”
    Online Access
    Government Document Electronic eBook

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  18. 18
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    Minerals yearbook, 1938. Compiled under the supervision of H. Herbert Hughes, Economics and Statistics Branch.

    Published 1937
    Other Authors: “…Ridgway, Robert H.…”
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  19. 19
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    Minerals Yearbook, 1937. Compiled under the supervision of H.H. Hughes, Economics and Statistics Branch.

    Published 1937
    Other Authors: “…Ridgway, Robert H.…”
    Online Access
    Government Document Electronic eBook

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  20. 20
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    Minerals Yearbook, 1934, [by] O.E. Kiessling, chief economist, Division of Mineral Statistics.

    Published 1935
    Other Authors: “…Ridgway, Robert H.…”
    Online Access
    Government Document Electronic eBook

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