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The Brown Hematite Iron Ore Banks of that Part of Nittany Valley Called Warrior's Mark Valley, Half Moon Valley and Spruce Creek Valley, in Huntingdon and Centre Counties, Pennsylvania, Owned by Lyon, Shorb & Co., Pittsburg, Pa

J. Peter Lesley

出版	McCalla & Stavely, prs., 1874
URL	http://books.google.com.hk/books?id=W7A4AQAAMAAJ&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN