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Morin, Stephen; Palis, Florencia; McAllister, Karen; Papag, Aida; Magsumbol, Melina(International Institute for Environment and Development (IIED), London, 2001)
Krishnasamy, S.; Amerasinghe, Felix P.; Sakthivadivel, R.; Ravi, G.; Tewari, S. C.; Van Der Hoek, Wim(International Water Management Institute, Colombo, Sri Lanka, 2003)