Oregon Bureau of Mines and Geology creator text xx n.p.] 1915 [Panama-Pacific ed.] monographic eng

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1 p. l., [5]-40 p. illus., fold. map. 24 cm. Oregon bureau of mines and geology. A list of the important minerals of Oregon and brief description of their occurrence and development. On cover: Panama-Pacific exposition, 1915. Mines and mineral resources Oregon Panama-Pacific International Exposition (1915 : San Francisco, Calif.) TN24.O7 A45 Y/M66.2M66/2 Y/M66.2M66/2 gs 15000880 Library, U.S. Geological Survey 791115 20260227111318.0 gs 15000880