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The Hunt and Douglas Process for Extracting Copper from its Ores. With an Appendix Including Notes on the Treatment of Silver and Gold Ores and the Plate - Tapa dura

Hunt, Thomas Sterry; Douglas, James; Stewart, James Oscar

 
9783566091828: The Hunt and Douglas Process for Extracting Copper from its Ores. With an Appendix Including Notes on the Treatment of Silver and Gold Ores and the Plate