@book{12806,
	author = {Mara, Duncan and Cairncross, Sandy and World Health Organization.},
	title = {Wastewater and excreta use in agriculture and aquaculture in developing countries : engineering and managerial guidelines for health risk minimization.},
	publisher = {s.n.],},
	year = {1987.},
	address = {[s.l. : }
}