edited by Luis S. Pereira and John W. Gowing ; Portuguese National Committee of the International Commission on Irrigation & Drainage ; selected papers of the 1st Inter-Regional Conference "Environment-Water: Innovative Issues in Irrigation and Drainage", held in Lisbon, Portugal, September 1998E&FN Spon1998
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Author Heading...owing, John W. International Commission on Irrigation and Drainage. Portuguese National Committee