References
- ↑ U.S. Geological Survey Geographic Names Information System: Round Valley, Nebraska
- ↑ "Custer County". Jim Forte Postal History. Retrieved August 25, 2014.
Municipalities and communities of Custer County, Nebraska, United States | ||
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41°34′06″N 99°31′10″W / 41.56833°N 99.51944°W
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