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An Important Discovery: Gold in an amorphous and chemically combined condition in nature. A pamphlet, containing a paper read before the Polytechnic Association of the Academy of Arts and Sciences in New-York, March 12, 1868, etc

出版	1868
URL	http://books.google.com.hk/books?id=qSVYAAAAcAAJ&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN