D. A. R.,
Water management at the river basin level : challenges in Latin America, vol. no. 29. Santiago, Chile: United Nations Economic Commission for Latin America and the Caribbean (ECLAC), 2001, p. 79 p. : 8 boxes, 1 fig., 2 tab.
M. de Villiers,
Water : the fate of our most precious resource, Paperback. Boston, MA, USA: Houghton Mifflin Company, 2001, p. xvi, 352 p. : maps.