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Browsing by Author "Blackwell, David D."




TitleAuthor(s)Issue Date
The Ore Bin ; Vol. 37 No. 7 (June 1974)Oregon. Dept. of Geology and Mineral Industries; Bowen, Richard G.; Blackwell, David D.Jul-1975
The Ore bin ; Vol. 38 No. 3 (March 1976)Bowen, Richard G.; Blackwell, David D.; Hull, Donald A.; Peterson, Norman V.; Oregon. Dept. of Geology and Mineral IndustriesMar-1976