Image: South Dakota East River West River
Description: Map of the US state of South Dakota, highlighting the regions known as "East River" and "West River". The regions are divided by the Missouri River, depicted as a dark blue line down the center of the map.
Title: South Dakota East River West River
Credit: Original base map by User:Ruhrfisch File:South Dakota Locator Map.PNG
Usage Terms: Creative Commons Attribution-Share Alike 3.0
License: CC BY-SA 3.0
License Link: http://creativecommons.org/licenses/by-sa/3.0
Attribution Required?: Yes