@book{31451,
	author = {Benesch, Franz. and Farreras, Pedro.},
	title = {Obstetricia de la vaca y la yegua / },
	editor = {Tall. Gráf. de la S.G. de P.)},
	publisher = {Labor, },
	year = {1950 (},
	address = {Barcelona, etc. : },
	edition = {2ª ed.}
}