Philpotts, J.A., and Evans, J.R., 1992, Rare earth minerals in "thunder eggs" from Zarembo Island, southeast Alaska, in Bradley, D.C., and Dusel-Bacon, Cynthia, eds., Geologic studies in Alaska by the U.S. Geological Survey, 1991: U.S. Geological Survey Bulletin 2041, p. 98-105.
This publication is part of a larger work. Please see B 2041 for more information.