📕 Source : CRC Press© - Groundwater around the World- A geographic synopsis. // 2013 // 372 pages // Jean Margat, Jac van der Gun. // ISBN 978 0 203 77214-0

https://www.un-igrac.org/sites/default/files/resources/files/Groundwater_around_world.pdf

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Source : CRC Press© // Release year — 2013.

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