Dutro, J.T., Jr., and Douglass, R.C., 1961, Pennsylvanian rocks in southeastern Alaska, in U.S. Geological Survey, Geological survey research 1961, Short papers in the geologic and hydrologic sciences, Articles 1-146: U.S. Geological Survey Professional Paper 424-B, p. B239-B240.
This publication is part of a larger work. Please see P 424-B for more information.