@Book{BDG201890614210, title = "Geomorfolog\'{\i}a", author = "Passarge, Siegfried", publisher = "Barcelona ; Buenos Aires : Labor", editor = "Labor", series = "(Labor. Biblioteca de iniciaci\'{o}n cultural. Secci\'{o}n VI. Geograf\'{\i}a ; 290)", URL = "http://biblioteca.galiciana.gal/es/consulta/registro.do?id=501049", year = "1931", }