[1] ICID, Int Commiss Irrigat & Drainage, Ctr Ecol & Hydrol, Chairman Work Grp Sustainable Use Nat Resources C, Wallingford OX10 8BB, Oxon, England
[2] ICID, Int Commiss Irrigat & Drainage, Chairman Work Grp Water Qual, Wallingford OX10 8BB, Oxon, England