"Top Ten Montana Weather Events of the 20th Century". National Weather Service Unveils Montana's Top Ten Weather/Water/Climate Events of the 20th Century. National Weather Service. Archived from the original on May 26, 2024. Retrieved June 1, 2015.
"Top Ten Montana Weather Events of the 20th Century". National Weather Service Unveils Montana's Top Ten Weather/Water/Climate Events of the 20th Century. National Weather Service. Archived from the original on May 26, 2024. Retrieved June 1, 2015.
tamu.edu
repository.tamu.edu
Darton, Nelson Horatio (1920). Syracuse-Lakin folio, Kansas. Folios of the Geologic Atlas, No. 212: United States Department of the Interior, U.S. Geological Survey. p. 17 (plate 2). Archived from the original on October 4, 2011. Retrieved October 6, 2010.{{cite book}}: CS1 maint: location (link)
"Physiographic Regions". U.S. Department of the Interior. U.S. Geological Survey. Archived from the original on May 15, 2006. Retrieved October 6, 2010.
ne.water.usgs.gov
"USGS High Plains Aquifer WLMS". U.S. Department of the Interior. U.S. Geological Survey. Archived from the original on May 27, 2010. Retrieved October 6, 2010.
web.archive.org
Darton, Nelson Horatio (1920). Syracuse-Lakin folio, Kansas. Folios of the Geologic Atlas, No. 212: United States Department of the Interior, U.S. Geological Survey. p. 17 (plate 2). Archived from the original on October 4, 2011. Retrieved October 6, 2010.{{cite book}}: CS1 maint: location (link)
"Physiographic Regions". U.S. Department of the Interior. U.S. Geological Survey. Archived from the original on May 15, 2006. Retrieved October 6, 2010.
"USGS High Plains Aquifer WLMS". U.S. Department of the Interior. U.S. Geological Survey. Archived from the original on May 27, 2010. Retrieved October 6, 2010.