Marincovich, Louie, Jr., and Wiggins, V.D., 1990, Oligocene age of strata on Unga Island, Shumagin Islands, southwestern Alaska, in Dover, J.H., and Galloway, J.P., eds., Geologic studies in Alaska by the U.S. Geological Survey, 1989: U.S. Geological Survey Bulletin 1946, p. 39-43.
This publication is part of a larger work. Please see B 1946 for more information.