TY - RPRT TI - The hydrothermal system in southern Grass Valley, Pershing County, Nevada AU - Alan H. Welch AU - M.L. Sorey AU - F. H. Olmsted PY - 1981 DO - 10.3133/ofr81915 UR - https://pubs.usgs.gov/publication/ofr81915 ID - ofr81915 ER -