@book{9946,
	author = {Kalbermatten, John M.},
	title = {Appropriate technology for water supply and sanitation :},
	publisher = {World Bank,},
	year = {1980.},
	series = {Appropriate technology for water supply and waste disposal.},
	address = {[S.l.] :},
	url = {http://www.amazon.com/exec/obidos/ASIN/B0006XTRCI/chopaconline-20}
}