1. Geology of southern Adak Island and Kagalska Island, Alaska / by George D. Fraser and George L. Snyder. Fraser, George D. (George Dewitt), 1920- [Washington, D.C.] : United States Department of the Interior, Geological Survey, 1959.Washington : United States Government Printing Office. Book Online
2. Geology of northern Adak Island, Alaska / by Robert R. Coats. Coats, Robert R. (Robert Roy), 1910-1995 [Washington, D.C.] : United States Department of the Interior, Geological Survey, 1956.Washington : United States Government Printing Office. Book Online