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[1]
![](images/www.png) http://www.oerafrica.org Last accessed : 2015/05/05
| 2015
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![](images/imprime.png) |
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[2]
![](images/www.png) http://iite.unesco.org Last accessed : 2015/03/23
| 2014
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![](images/imprime.png) |
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[3]
![](images/www.png) http://www.col.org Last accessed : 2012/07/04
| 2012
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![](images/imprime.png) |
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[4]
![](images/www.png) http://www.col.org Last accessed : 2012/11/19
| |
![](images/imprime.png) |
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[5]
![](images/www.png) http://www.col.org Last accessed : 2011/10/27
| 2011
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![](images/imprime.png) |
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