Keller, Al, 1976, Okmok Caldera: in Henning, R. A., Rosenthal, C. H., Olds, Barbara, and Reading, Ed, (eds.), Alaska's volcanoes, northern link in the ring of fire, Alaska Geographic, v. 4, n. 1, p. 75-82.
Citation Updated: 2005-06-10 00:04:10