@Misc{ARA20110003524, title = "Anuario estad\'{\i}stico agrario de Arag\'{o}n", publisher = "[Zaragoza] : D.G.P.A.", editor = "D.G.P.A.", URL = "https://bibliotecavirtual.aragon.es/es/consulta/registro.do?id=3552", year = "1989", }