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2. Campbell Scientific, 1995. CR10X measurement and control module, Instruction manual. Campbell Scientific, Leicester, UK.
3. Canavos, G.C., 1989. Probabilidad y estadı́stica, Aplicaciones y Métodos. McGraw-Hill, México.
4. Doorenbos, J., Pruitt, W.O., 1984. Crop Water Requirements. Irrig. and Drain. Paper 24, FAO, Rome, Italy.
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