| Microsoft Encarta Online Encyclopedia 2005 | The assassination marked the start of a decade of bloodshed, called La Violencia the violence , which took the lives of an estimated 180,000 Colombians before it subsided in 1958 |
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| Retrieved on 14 May 2012 | 39 127 5 81 3 |
Microsoft Encarta Online Encyclopedia 2005.
| Lilian Yaffe 3 October 2011 | La Legislacion y el derecho en Colombia |
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Colombian Constitution of 1991 Title XI — Concerning the territorial organization — Chapter 3 — Concerning the municipal regime — Article 318• Retrieved on 14 May 2012.
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