Marks, John H. (John Henry)Hedelund, George T.2018-06-152022-02-032018-06-152022-02-03https://hdl.handle.net/11124/172391Mine report no. 929.Typescript (carbon copy).reportsengIn copyright - non-commercial use permitted (http://rightsstatements.org/vocab/InC-NC/1.0/).Mines and mineral resources -- Colorado -- Boulder CountyOres -- Sampling and estimation -- Colorado -- Boulder CountyText