Byers, F. M. Jr., 1959, Geology of Umnak and Bogoslof Islands, Aleutian Islands, Alaska: in Investigations of Alaskan volcanoes, U.S. Geological Survey Bulletin 1028-L, p. 267-369, 5 sheets, scale 1 at 1:63,360, 1 at 1:96,000, and 1 at 1:300,000.
Citation Updated: 2005-07-28 19:37:51