| 1. CASDE | Roca -- Lancaster County
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| Named derived from the Spanish word for rock. Includes its history and a photograph. |
| http://casde.unl.edu/history/counties/lancaster/roca |
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| 3. Roca Local News: Topix
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| Local, regional, and statewide news collected from diverse sources on the web. |
| http://www.topix.com/city/roca-ne |
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| 4. Roca, Nebraska USA
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| Provides a community profile, historical background, a calendar of events, information about schools, churches and industries, a business directory and village map. |
| http://interlinc.ci.lincoln.ne.us/towns/roca |
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