@book{43412,
	author = {Méndez Céspedes, Pablo E and Roa Trujillo, Sonia H},
	title = {Recursos Naturales Dos.},
	publisher = {Universidad Santo Tomás,},
	year = {2010.},
	address = {Bogotá :},
	note = {Incluye Indice y Bibliografia.}
}