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द्वारा Etcheson, Warren Wade, 1920-
प्रकाशित 1959 -
द्वारा Pine, B. Joseph
प्रकाशित 1999 -
द्वारा Strom, Axel E.
प्रकाशित 1949 -
Index to Northwest mining truthincludes mining activities in Washington Idaho Montana & British Columbia & prominent mining personalities volumes 1 through 17Bookप्रकाशित 2004
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द्वारा Williams, Nathan, 1986-
प्रकाशित 2017