@Misc{BVPB20100039793, title = "[Siluriano] [Material gr\'{a}fico proyectable]", publisher = "Stuttgart : Th. Benzinger Lichtbilderverlag", editor = "Th. Benzinger Lichtbilderverlag", series = "(Paleontolog\'{\i}a) (Formaciones paleozoicas ; 2)", URL = "https://bvpb.mcu.es/es/consulta/registro.do?id=418779", year = "1922", }