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, “Living waters : conserving the source of life : thirsty crops : our food and clothes: eating up nature and wearing out he environment?”. WWF International, Zeist, The Netherlands, p. 18 p. : boxes, photogr., 2006.
, “Milestones in water conservation : global freshwater programme”. WWF International, Zeist, The Netherlands, p. 13 p. : fig., photogr., 2006.