ASSAY AND PHYSICAL MAP OF THE SIERRA BLANCA TUNNELS
Dates
Info Date
1914
Summary
APPROXIMATELY LOCATED IN OR AROUND THE BULLFROG MINING DISTRICT; SCALE 1 INCH = 20 FEET; SHOWING STRUCTURE, DEVELOPMENT, ASSAYS, AND EXPLORED AREA TO DATE ; AUTHOR: O'BRIEN, J.D.
Summary
APPROXIMATELY LOCATED IN OR AROUND THE BULLFROG MINING DISTRICT; SCALE 1 INCH = 20 FEET; SHOWING STRUCTURE, DEVELOPMENT, ASSAYS, AND EXPLORED AREA TO DATE ; AUTHOR: O'BRIEN, J.D.