Luedke, R. G., and Smith, R. L., 1986, Map showing distribution, composition, and age of Late Cenozoic volcanic centers in Alaska: U.S. Geological Survey Miscellaneous Investigations Series Map I 1091-F, unpaged, 3 sheets, scale 1:1,000,000. ADGGS website with links to map PDFs
Hoare, J. M., and Condon, W. H., 1971, Geologic map of the Marshall quadrangle, western Alaska: U.S. Geological Survey Miscellaneous Investigations Series Map I 0668, unpaged, 1 sheet, scale 1:250,000.