Shacklette, H.T., and Rubin, Meyer, 1969, Radiocarbon dating of ash deposits on Amchitka Island, Alaska, in U.S. Geological Survey, Geological survey research 1969, Chapter B: U.S. Geological Survey Professional Paper 650-B, p. B81-B83.
This publication is part of a larger work. Please see P 650-B for more information.