Report of the State Mineralogist (1882)

Report of the State Mineralogist (1892)

Report of the State Mineralogist (1894)

Report of the State Mineralogist (1920)

Minerals of California (1914)

Tecopa Mine Maps

Tecopa Mining District Map

Columbia #2 Mine Map

Gunsite Mine Map

Noonday Mine Map

War Eagle Mine Map

Mine Exploring News Stories

Los Angeles Times (6/30/02)

Forbes Magazine (11/10/08)

Miscellaneous Maps

Dale Mining District Map

Darwin Mine Maps