Harpel, C. J., & Ewert, J. W. (2000). Bibliography of literature from 1990-1997 pertaining to Holocene and fumarolic Pleistocene volcanoes of Alaska, Canada, and the conterminous United States (Version 1.0.). [U.S. Geological Survey].
Chicago Style (17th ed.) CitationHarpel, Christopher J., and John W. Ewert. Bibliography of Literature from 1990-1997 Pertaining to Holocene and Fumarolic Pleistocene Volcanoes of Alaska, Canada, and the Conterminous United States. Version 1.0. [Menlo Park, CA?]: [U.S. Geological Survey], 2000.
MLA (9th ed.) CitationHarpel, Christopher J., and John W. Ewert. Bibliography of Literature from 1990-1997 Pertaining to Holocene and Fumarolic Pleistocene Volcanoes of Alaska, Canada, and the Conterminous United States. Version 1.0. [U.S. Geological Survey], 2000.