@book{136441,
	author = {International Petroleum Industry Environmental Conservation Association, IPIECA},
	title = {Urban air quality management},
	publisher = {International Petroleum Industry Environmental Conservation Association, IPIECA},
	year = {1997},
	address = {London},
	note = {Página visitada en junio de 2002. ; Navegadores de Internet ; Adobe Acrobat (PDF)},
	url = {http://www.ipieca.org/downloads/health/UAQM_Vol2.pdf}
}