@book{23389,
	author = {Bernal, John D. and Gortari, Eli de},
	title = {La ciencia en nuestro tiempo  /},
	publisher = {Editorial Nueva Imagen },
	year = {1989.},
	series = {El contexto cientifico},
	address = {Mexico },
	edition = {9 ed.},
	note = {Incluye indice}
}