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Boundaries: Instituto Brasileiro de Geografia e Estatística (IBGE), OCHA ROLAC (https://data.humdata.org/dataset/brazil-administrative-level-0-boundaries) via geoBoundaries, CC BY 3.0 IGO (https://creativecommons.org/licenses/by/3.0/igo/); boundaries modified
Nothing has been written about João Costa here, and neither Wikipedia nor Wikivoyage has an article we could draw one from. If you know the place, that makes you a better source than anything we have. Tell us what is worth knowing and where you got it.
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