@book{120981,
	author = {Le Bon, Gustave,},
	title = {La evolución de la materia},
	publisher = {Librería Gutenberg de José Ruiz},
	year = {1923.},
	series = {Biblioteca de filosofía científica},
	address = {Madrid},
	edition = {3. ed.},
	note = {Translation of : L'evolution de la matiere.}
}