Search results for "1857" - New World Encyclopedia
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File:Hydraulic mining in Dutch Flat, California, between 1857 and 1870.jpg [https://commons.wikimedia.org/wiki/File:Hydraulic_mining_in_Dutch_Flat,_California,_between_1857_and_1870.jpg source and rights] ...(640 × 477 (63 KB)) - 16:27, 31 March 2020
