@book{25227,
	author = {Arán, Santos.},
	title = {Las aves y sus productos / },
	editor = {Tip. Yagües)},
	publisher = {[s.n., },
	year = {1940?] (},
	series = {Biblioteca pecuaría},
	address = {Madrid : },
	edition = {4ª ed.}
}