@book{11775,
	author = {Lloyd, Barry. and Helmer, Richard, and World Health Organization.},
	title = {Surveillance of drinking water quality in rural areas /},
	publisher = {Longman Scientific & Technical ;},
	year = {1991.},
	address = {Burnt Mill, Harlow, Essex, England :},
	note = {"Published on behalf of the World Health Organization and the United Nations Environment Programme."}
}