@book{66210,
	author = {Galán y Ruiz, Gabriel, },
	title = {Cálculo de las probabilidades / },
	editor = {Gráf. Reunidas)},
	publisher = {[s.n.], },
	year = {1923 (},
	address = {Madrid : },
	url = {http://bdh-rd.bne.es/viewer.vm?id=0000247814&page=1 }
}