Mineral resources of the region around Boulder dam /
Hewett, Donnel Foster,1881-
Washington : U.S. Govt. Print. Off.,
1936.
At head of title: United States Department of the Interior, Harold L. Ickes, Secretary, Geological survey. W.C. Mendenhall, director.
Bibliographical foot-notes
Mines and mineral resources
Mines and mineral resources
Mines and mineral resources