Pomeroys Mining Manual for Prospectors, Miners and Schools: Showing Where and How to Search for Gold and Silver Mines, and to Make Tests (1881)Henry R. Pomeroy This Is A New Release Of The Original 1881 Edition. |
Pomeroys Mining Manual for Prospectors, Miners and Schools: Showing Where and How to Search for Gold and Silver Mines, and to Make Tests (1881)Henry R. Pomeroy This Is A New Release Of The Original 1881 Edition. |