Bettles River Canyon

U.S. Bureau of Mines, 1973, Alaska 1:250,000-scale quadrangle map overlays showing mineral deposit locations, principal minerals, and number and type of claims: U.S. Bureau of Mines Open-File Report 20-73, 95 overlays (updated in 1986, 1987).Dillon, J.T., 1987, Upper Koyukuk District land and mining claim status current to 1985: Alaska Division of Geological and Geophysical Surveys Public-Data File 87-11, 1 sheet, scale 1:125,000.Reed, I.M., 1938, Upper Koyukuk region, Alaska (Wiseman, Chandalar, and Bettles): Alaska Territorial Department of Mines Miscellaneous Report 194-7, 201 p.