dcsimg
Please read BHL's Acknowledgment of Harmful Content
Sort By:
  1. By: Butler, B. S. (Bert Sylvenus),
    Publication info: Washington, Govt. print. off, 1914
    Holding Institution: Library of Congress
    Subjects: Colorado  Copper ores  Geology  Mesa County  
  2. By: Irving, Roland Duer,
    Publication info: Washington, Govt. Print. Off, 1883
    Holding Institution: University of Connecticut Libraries
    Subjects: Copper ores  Geology  Michigan  Wisconsin  
  3. By: United States. Bureau of Land Management. Portland Service Center.
    Publication info: Portland, Or, U.S. Department of the Interior, Bureau of Land Management, Portland Service Center, 1970
    Holding Institution: Bureau of Land Management
    Subjects: Analysis  Bureau of Land Management  Copper ores  Igneous rocks  Mines and mineral resources  Porphyry  Records and correspondence  Southwestern States  United States