The Comstock lode [microform] : its character, and the probable mode of its continuance in depth /
Richthofen, Ferdinand,Freiherr von,1833-1905.
Sutro Tunnel Company.
San Francisco : Sutro Tunnel Co.,
1866.
A report to the trustees of the Sutro Tunnel Company.--Cf. p. [3]
"(November 22d, 1865.)"
Sabin 71227
Microfiche.
Mines and mineral resources