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The Assayer's Guide
其他書名
Or, Practical Directions to Assayers, Miners, and Smelters for the Tests and Assays, by Heat and Wet Processes, of the Ores of All the Principal Metals, of Gold and Silver Coins and Alloys, and of Coal, Etc
出版H.C. Baird, 1875
URLhttp://books.google.com.hk/books?id=Efc0vwEACAAJ&hl=&source=gbs_api