@book{131244,
	author = {Rudolph, Randy and ARPEL and Rudolph, Randy and Canadian International Development Agency, CIDA},
	title = {Métodos de monitoreo para evaluar la calidad del aire urbano},
	publisher = {ARPEL},
	year = {1998},
	series = {Guía ambiental},
	address = {Uruguay}
}