(1994). Map showing the thickness and character of quaternary sediments in the glaciated United States east of the Rocky Mountains, Northern Plains states (West of 102 ̊West longitude). U.S. Geological Survey.
Chicago Style (17th ed.) CitationMap Showing the Thickness and Character of Quaternary Sediments in the Glaciated United States East of the Rocky Mountains, Northern Plains States (West of 102 ̊West Longitude). Denver, CO: U.S. Geological Survey, 1994.
MLA (9th ed.) CitationMap Showing the Thickness and Character of Quaternary Sediments in the Glaciated United States East of the Rocky Mountains, Northern Plains States (West of 102 ̊West Longitude). U.S. Geological Survey, 1994.
Warning: These citations may not always be 100% accurate.