- Handbook of Texas Online: Old River-Winfree - Offers historical information and location on Old River -Winfree, Texas.
www.tsha.utexas.edu/handbook/online/articles/view/OO/hjo10.html
- USGS GNIS Feature Details - Offers population and historical information, with elevation measurements located in Chamber County, Texas.
geonames.usgs.gov/pls/gnis/web_query.GetDetail?tab=Y&id=1388234
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