@book{23071,
	author = {Alvarado, Salustio.},
	title = {Curso de Historia natural / },
	editor = {Tall. Gráf. de la S.G. de P.)},
	publisher = {[s.n., },
	year = {1934] (},
	address = {Barcelona : },
	edition = {3ª ed.}
}