@book{30392,
	author = {Custodio, Emilio.},
	title = {Groundwater economics :},
	publisher = {Elsevier ;},
	year = {1989.},
	address = {Amsterdam ;},
	note = {Papers presented at the Symposium and Workshop on Ground Water Economics, organized by the Curso Internacional de Hidrología Subterránea and the Centro de Estudios e Investigación del Augua, held Oct. 19-23, 1987, in Bareclona, Spain.}
}