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  1. 1
    Annual report for the year ... /
    Published 1954
    Serial
  2. 2
    Proceedings of the fifteenth Forum on Geology of Industrial Minerals, Golden, Colorado, June 13-15, 1979 : theme, industrial minerals in Colorado and the Rocky Mountain region /
    Published 1980
    Conference Proceeding Book
  3. 3
    Publications on work done by U.S.G.S. : in cooperation with state of Colorado /
    by Crain, Harry M.
    Published 1945
    Book
  4. 4
    Geological and mineralogical number.
    Book
  5. 5
    Mineral resources of Colorado, first sequel /
    Published 1960
    Book
  6. 6
    Cooperative work by U.S. Geological Survey and State of Colorado /
    by Crain, Harry M.
    Published 1947
    Book
  7. 7
    Guide to the geology of central Colorado with index map showing major geologic structure and significant oil and gas information ; field trips of the Thirty-third Annual Meeting of the American Association of Petroleum Geologists, Denver, Colorado, April 26-29, 1948 /
    Published 1948
    Book
  8. 8
    Bibliography and index of the mines, mining companies and mills of Gilpin county, Colorado : beginning with the discovery of gold in 1859 /
    by Hoyt, Mary Elizabeth
    Published 1937
    Book
  9. 9
    Exploring rocks, minerals, fossils in Colorado /
    Book
  10. 10
    Bulletin /
    Serial
  11. 11
    Colorado; its gold and silver mines : farms and stock ranges, and health and pleasure resorts. Tourist's guide to the Rocky Mountains /
    by Fossett, Frank
    Published 1879
    Book
  12. 12
    Ghost towns of Colorado /
    Published 1947
    Book
  13. 13
    Geology and natural resources of Colorado /
    by George, Russell D., 1866-
    Published 1927
    Book
  14. 14
    Colorado mining : a photographic history /
    by Smith, Duane A.
    Published 1977
    Book
  15. 15
    Energy resources of the Piceance Creek Basin, Colorado : twenty-fifth field conference, Rocky Mountain Association of Geologists, Denver, Colorado, 1974 /
    Published 1974
    Book
  16. 16
    Mines and minerals of the Great American Rift (Colorado-New Mexico) /
    by Holmes, Richard Walker
    Published 1983
    Book
  17. 17
    Journeys of observation /
    Book
  18. 18
    Pioneers of the San Juan country /
    Published 1942
    Book
  19. 19
    The mines of Colorado /
    Microform Book
  20. 20
    Bonanza Victorian : architecture and society in Colorado mining towns /
    by Stoehr, C. Eric
    Published 1975
    Book
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