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Davis Handbook of the Porcupine Gold District, with a Diretory of and a Review of Mining in Northern Ontario with an Analysis of the Production and Dividends of the Cobalt Silver District

H. P. Davis

出版	Place of publication not identified, 1911
URL	http://books.google.com.hk/books?id=QNdxQwAACAAJ&hl=&source=gbs_api