Geological Survey & Soller, D. R. (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 102⁰ west longitude). The Survey ; For sale by Map Distribution.
Chicago Style (17th ed.) CitationGeological Survey and D. R. Soller. Map Showing the Thickness and Character of Quaternary Sediments in the Glaciated United States East of the Rocky Mountains--northern Plains States (west of 102⁰ West Longitude). Reston, VA : Denver, CO: The Survey ; For sale by Map Distribution, 1994.
MLA (8th ed.) CitationGeological Survey and D. R. Soller. Map Showing the Thickness and Character of Quaternary Sediments in the Glaciated United States East of the Rocky Mountains--northern Plains States (west of 102⁰ West Longitude). The Survey ; For sale by Map Distribution, 1994.