The Porcupine placer district, Alaska,
Wright, Charles Will, 1879-
The Porcupine placer district, Alaska, by Charles W. Wright. - Washington, Govt. Print. Off., 1904. - 35, v p. illus., 10 pl. (incl. maps) 24 cm. - U.S. Geological survey. Bulletin no. 236 .
Subject series: A, Economic geology, 37; B, Discriptive geology, 42.
gs 04000162
Geology--Alaska.
Gold mines and mining--Alaska.
QE75 / .B9 no. 236
The Porcupine placer district, Alaska, by Charles W. Wright. - Washington, Govt. Print. Off., 1904. - 35, v p. illus., 10 pl. (incl. maps) 24 cm. - U.S. Geological survey. Bulletin no. 236 .
Subject series: A, Economic geology, 37; B, Discriptive geology, 42.
gs 04000162
Geology--Alaska.
Gold mines and mining--Alaska.
QE75 / .B9 no. 236