Mitchell, John Manual of Practical Assaying, Intended for the use of Metallurgists, Captains of Mines, and Assayers in General ..
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Manual of Practical Assaying, Intended for the use of Metallurgists, Captains of Mines, and Assayers in General ..
Manual of Practical Assaying, Intended for the use of Metallurgists, Captains of Mines, and Assayers in General ..