1898. Geological Survey (U.S.). Relief shown by contours, hachures, and spot heights.; "Surveyed in 1896-1897."; "R.U. Goode, Geographer in charge. Triangulation by S.S. Gannett. ... U.S. Geological Survey (Washington, D.C).
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1898. 1 map : col. ; 77 x 44 cm. Contour interval 20 ft.
2004. National Atlas of the United States. This point shapefile includes Holocene volcanoes, which are those thought to be active in the last 10,000 years, that are within an extended area o... National Atlas of the United States.