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. 2014 Jan 30;9(1):e87244. doi: 10.1371/journal.pone.0087244

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© 2014 de Andrade et al

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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Sources: Institute of Land and Cartography Geosciences website, 2010 [17] and Brazilian Institute of Geography and Statistics, 2010 [18].