| 1. CIA - The World Factbook: Gibraltar
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| Features map and brief descriptions of the geography, people, government, economy, communications, transportation, military and transnational issues. |
| https://www.cia.gov/library/publications/the-world-factbook/geos/gi.html |
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| 2. Wikipedia - Gibraltar
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| Hyperlinked encyclopedia article covers the country's history, government and politics, geography, economy, demographics, language and culture. |
| http://en.wikipedia.org/wiki/Gibraltar |
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