@book{2912,
	author = {Herrera Koerner, Ingrid Ninón. and Morales Vilegas, Francisco Javier,},
	title = {Factores ambientales y recursos compartidos /},
	publisher = {Trillas },
	year = {c1993.},
	address = {México },
	note = {Bibliografía: p. 79.}
}