@book{11997,
	author = {Meybeck, M. and Global Environmental Monitoring System.},
	title = {Global freshwater quality},
	publisher = {Published on behalf of the World Health Organization and the United Nations Environment Programme by Blackwell Reference},
	year = {1990.},
	address = {Cambridge, Mass., U.S.A.},
	note = {At head of title: Global Environment Monitoring System.}
}