Letter The following article is Free article

Quantitative maps of groundwater resources in Africa

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Published 19 April 2012 © 2012 IOP Publishing Ltd
, , Citation A M MacDonald et al 2012 Environ. Res. Lett. 7 024009 DOI 10.1088/1748-9326/7/2/024009

This article is corrected by 2012 Environ. Res. Lett. 7 021003