@Misc{RAH20160035018, title = "Reduccion del facs\'{\i}mile de la carta que hizo Gabriel de Valseca el a\~{n}o 1439 [Material cartogr\'{a}fico]", author = "Valseca, Gabriel de", publisher = "Madrid : [s.n.]", editor = "[s.n.]", URL = "https://bibliotecadigital.rah.es/es/consulta/registro.do?id=61175", year = "1892", }