"In 1984, at the request of the U.S. Bureau of Land Management, the U.S. Bureau of Mines studied 41,315 acres of the 72,690-acre Pueblo Mountains WSA (Wilderness Study Area), in order to evaluate its mineral resources ... The Pueblo Mountains WSA encompasses approximately 72,090 acres in the south-central portion of Harney County, Oregon, and 600 acres in Humboldt County, Nevada ... The study was a cooperative study with the USGS (U.S. Geological Survey). The Bureau examined and evaluated mineral resources at known mines, prospects, and mineralized areas"--Leaf 4.