Referencias

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https://core.ac.uk/download/pdf/51375592.pdf

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http://www.limnogeology.ethz.ch/bushetalspringer.pdf

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https://data.footprintnetwork.org/?_ga=2.21992763.1676961295.1597012183-414175331.1593735936#/countryTrends?cn=89&type=BCtot,EFCtot

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