@book{836,
	author = {León-Dufour, Michel.},
	title = {Teilhard de Chardin y el problema del porvenir del hombre},
	publisher = {Taurus Ediciones},
	year = {1969.},
	address = {Madrid},
	note = {Translation of : Teilhard de Chardin et le probleme de l'avenir humain.}
}