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![]() Date: 2015-12-15 12:28:47Mining Economic geology Ore Copper extraction techniques Greenside Mine Copper mining in the United States | Add to Reading List |
![]() | The Story of Ore Hill Zinc-Lead Mine, Warren, Grafton County, NH By Anna Wilken December 2014 Through the 80 years the mine has been worked it has had different names: The Copper Mine, The Warren Silver-Lead Mine, The WaDocID: 1r8UA - View Document |
![]() | Vol. XXV, No.1 January, 1954 ~ui&£rzit~ of ~ri~oun ~ull£tiuDocID: 1pp7J - View Document |