@book{6779,
	author = {Villafuerte Solis, Daniel},
	title = {Sistema de ciudades de Chiapas :},
	publisher = {Universidad de Ciencias y Artes del Estado de Chiapas, },
	year = {c1999},
	series = {Ciencias sociales},
	address = {México, D.F. :},
	url = {https://www.cicy.mx/sitios/sib/doctoelectronico/7451.pdf}
}