Bergquist, H.R., 1961, Early Cretaceous (middle Neocomian) microfossils in south-central Alaska, in U.S. Geological Survey, Geological survey research 1961, Short papers in the geologic and hydrologic sciences, Articles 293-435: U.S. Geological Survey Professional Paper 424-D, p. D236-D237.
This publication is part of a larger work. Please see P 424-D for more information.