@Book{BVPB20140002108, title = "Salamanca", publisher = "Barcelona : Alberto Mart\'{\i}n", editor = "Alberto Mart\'{\i}n", series = "(Portfolio fotogr\'{a}fico de Espa\~{n}a ; 40)", URL = "https://bvpb.mcu.es/es/consulta/registro.do?id=487767", year = "1920", }