The Porcupine placer district, Alaska, by Charles W. Wright.

By: Material type: TextTextSeries: U.S. Geological survey. Bulletin ; no. 236Publication details: Washington, Govt. Print. Off., 1904.Description: 35, v p. illus., 10 pl. (incl. maps) 24 cmSubject(s): LOC classification:
  • QE75 .B9 no. 236
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Subject series: A, Economic geology, 37; B, Discriptive geology, 42.

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