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
Nelson, W. H., 1959, Geology of Segula, Davidof and Khvostof Islands, Alaska: in Investigations of Alaskan volcanoes, U.S. Geological Survey Bulletin 1028-K, p. 257-266, 2 sheets, scale 1:25,000. full-text PDF : 1.6 MB plate 1 PDF : 2 MB plate 37 PDF : 2.9 MB
Snyder, G. L., 1957, Ocean floor structures, northeastern Rat Islands, Alaska: in Investigations of Alaskan volcanoes, U.S. Geological Survey Bulletin 1028-G, p. 161-167, 1 plate, scale 1:125,000. full-text PDF : 325 KB plate 22 PDF : 5.6 MB