United States Geological Survey (2004-01-13). "Badwater". Death Valley Geology Field Trip. US Department of the Interior. Archived from the original on 2007-12-24. Retrieved 2009-09-05.
pubs.usgs.gov
Philip Stoffer (14 January 2004). "Changing Climates and Ancient Lakes"(.html). Desert Landforms and Surface Processes in the Mojave National Preserve and Vicinity. Open-File Report 2004-1007. USGS, US Department of the Interior. Retrieved 2009-09-12.
web.archive.org
United States Geological Survey (2004-01-13). "Badwater". Death Valley Geology Field Trip. US Department of the Interior. Archived from the original on 2007-12-24. Retrieved 2009-09-05.
