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2. Transfer functions and threshold values: from soil characteristics to land qualities;Bouma,1987
3. Soil Map of the European Communities, 1:1,000,000;CEC,1985
4. Simulation of Field Water Use and Crop Yield;Feddes,1978
5. Modelling soil water dynamics in the unsaturated zone — state of the art;Feddes;J. Hydrol.,1988