1. Geology of Rat Island, Aleutian Islands, Alaska / by Richard Q. Lewis, Willis H. Nelson, and Howard A. Powers. Lewis, Richard Quintin, 1919- [Washington, D.C.] : United States Department of the Interior, Geological Survey, 1960.Washington : United States Government Printing Office. Book Online
2. Geology of the Delarof and westernmost Andreanof Islands, Aleutian Islands, Alaska / by George D. Fraser and H. Frank Barnett. 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