| 2. City-Data.com: Charter Oak, Iowa
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| Profiles housing, population demographics, jobs, weather and climate tables. Contains a list of area hospitals, schools, airports, radio and TV broadcast stations, charts and maps. |
| http://www.city-data.com/city/Charter-Oak-Iowa.html |
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| 3. Wikipedia: Charter Oak, Iowa
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| Encyclopedia article covers geography and demographics of this city in Crawford County. |
| http://en.wikipedia.org/wiki/Charter_Oak,_Iowa |
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