Heindl, L.A.

Heindl, L.A., 1975. Hidden waters in arid lands : report of a workshop on groundwater research needs in arid and semi-arid zones held in Paris, France, 25 November 1974, Ottawa, Ont, Canada: International Development Research Centre (IDRC). Available at: http://fr.ircwash.org/sites/default/files/Heindl-1975-Hidden.pdf.