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Modelling flow and transport in the unsaturated zone : scale problems and spatial variability : a selection from the contributions to the Hydrological Sciences Programme Section HS1 of the XVI General Assembly of the European Geophysical Society, Wiesbaden, 22 - 26 April 1991
Feddes, Reinder A., (1993)
Contributions by Jans Wesseling, Jan van Schilfgaarde, and Herman Bouwer to effective and responsible water management in agriculture
Raats, Peter A.C., (2006)