Pomeroy's Mining Manual for Prospectors, Miners and Schools: Showing where and how to Search for Gold and Silver Mines, and to Make TestsHenry R. Pomeroy The author, 1881 - 119 strani |
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Pomeroys Mining Manual for Prospectors, Miners and Schools: Showing Where ... Henry R Pomeroy Predogled ni na voljo - 2014 |
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