@book{1946,
	author = {Cullington, J. M. and Sánchez, Guillermo Aparicio,},
	title = {Patos y gansos /},
	publisher = {ACRIBIA,},
	year = {1975.},
	series = {Manuales de Técnica Agropecuaria},
	address = {Zaragoza :},
	edition = {1ª ed.}
}