The Ceren Site: An Ancient Village in Central America Buried by Volcanic Ash. Revised and expanded edition. Belmont, CA: Wadsworth Publishing. 168 pp. For a comprehensive list of publications see external links below. References CU-Boulder, Department of Anthropology Bio https://web.archive.org/web/20111111085739/http://www.colorado.edu/Anthropology/people/bios/sheets.html Accessed October 8, 2011 Payson Sheets - GHEA: Global Human Econdynamics Alliance http://gheahome.org/cgi_bin/ghea_member_info.pl?id=9 Accessed October 8, 2011. Payson Sheets – Archaeological Institute of America. https://web.archive.org/web/20160201002807/http://www.archaeological.org/lecturer/paysonsheets. Accessed October 8, 2011 Payson D. Sheets - Résumé/CV: https://web.archive.org/web/20160221175145/http://gheahome.org/uploads/sheets54674/cv/CV-Sheets_dept_09.doc Accessed October 8, 2011 University of Colorado Boulder, (2007) "CU-Boulder Archaeology Team Discovers First Ancient Manioc Fields In Americas", press release August 20, 2007, accessed October 8, 2011. 2002 Payson Sheets, ed. Before the Volcano Erupted: The Ancient Ceren Village in Central America. Austin: University of Texas Press. Twenty two chapters. 226 pp. Archaeology Research in the Arenal Region, Costa Rica. https://web.archive.org/web/20110908011510/http://wwwghcc.msfc.nasa.gov/archeology/arenal.html Accessed October 8, 2011 External links Works by Payson D. Sheets in libraries (http://www.worldcat.org/search?q=payson+sheets&dblist=638&fq=ap%3A%22sheets+payson+d%22&qt=facet_ap (WorldCat Catalog) University of Colorado, Anthropology Department Faculty Bio (https://web.archive.org/web/20111111085739/http://www.colorado.edu/Anthropology/people/bios/sheets.html) Year of birth missing (living people) Living people American archaeologists Mayanists University of Colorado alumni University of Pennsylvania alumni