Search U.S. government technical reports digitized or harvested by TRAIL.
Blue-Ledge copper-zinc mine, Siskiyou County, Calif.
Investigation of the Minah lead-silver mine, Jefferson County, Mont.
Preliminary investigation of the Red Flats nickel deposit, Curry County, Oreg.
Exploration and utilization studies :John Day chromites, Oregon
Preliminary investigation of the Takilma-Waldo copper district, Josephine County, Oreg.