USGS B 844-E
Title:Reconnaissance of the northern Koyukuk Valley, Alaska
Publisher:U.S. Geological Survey
Ordering Info:USGS Publications Warehouse
Quadrangle(s):Bettles; Hughes; Survey Pass; Wiseman
Marshall, Robert, 1934, Reconnaissance of the northern Koyukuk Valley, Alaska: U.S. Geological Survey Bulletin 844-E, p. 247-256, 1 sheet, scale 1:500,000.