Buell, Arthur W.Kelly, LynneMann, John R. C.Biggs, Harold2025-09-052025-09-05https://hdl.handle.net/11124/180994Mine report no. 2006.Typescript (carbon copy).Title supplied by cataloger.Eight pages of correspondence ranging in date from 1926 to 1929 -- Grass Valley company plans for deep development [article dated November 15, 1930].reportsengIn copyright - non-commercial use permitted: http://rightsstatements.org/vocab/InC-NC/1.0/Mines and mineral resources -- California -- Nevada CountyVeins (Geology) -- California -- Nevada CountyGold ores -- California -- Nevada CountyOres -- California -- Nevada CountyText