The Innoko gold-placer district, Alaska, with accounts of the central Kuskokwim Valley and the Ruby Creek and Gold Hill placers,
by A. G. Maddren.
- Washington, Govt. Print. Off., 1910.
- 87 p. v fold. maps. (1 in pocket) 24 cm.
- U.S. Geological survey. Bulletin 410 .
- Geological Survey bulletin ; 410. .
Issued also as House doc. no. 188, 61st Cong., 2d sess.