@book{820,
	author = {SALAMAN, Redcliffe N. and HAWKES, J.G., and ESPAÑA},
	title = {Historia e influencia social de la patata /},
	publisher = {Centro de Publicaciones, Ministerio de Trabajo y Seguridad Social,},
	year = {D.L. 1991},
	series = {Historia social ;},
	address = {Madrid :}
}