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Travels in Siberia: Including Excursions Northwards, Down the Obi, to the Polar Circle, and Southwards, to the Chinese Frontier

Georg Adolf Erman

出版	Longman, Brown, Green, and Longmans, 1848
URL	http://books.google.com.hk/books?id=vEZTAAAAcAAJ&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN