@book{5517,
	author = {Candelario Rodríguez, David Jesús.},
	title = {Las estrategias ambientales de Petróleos Mexicanos en la Selva Lacandona, estado de Chiapas},
	publisher = {El Autor,},
	year = {1992},
	address = {Chapingo, Méx. :},
	note = {58-52}
}