@book{93645,
	author = {López Castañeda, Manuel.},
	title = {Productividad económica relativa del subsector lácteo del municipio de Lerdo, Durango de 1990 a 2004},
	publisher = {El autor,},
	year = {2007.},
	address = {Bermejillo, Dgo. :},
	url = {http://10.13.5.2/tesis/105212.pdf}
}