Austin, W. L.Raymer, George S.2018-11-192022-02-032018-11-192022-02-03https://hdl.handle.net/11124/172761Mine report no. 1001.Includes map.Includes a report by George S. Raymer.Typescript (carbon copy).reportsengIn copyright - non-commercial use permitted (http://rightsstatements.org/vocab/InC-NC/1.0/).Mines and mineral resources -- Colorado -- Costilla CountyOres -- Sampling and estimation -- Colorado -- Costilla CountyText