@Misc{CYL20100015957, title = "Feria de Muestras [Material gr\'{a}fico]: 15-30 septiembre 1935, Valladolid", author = "Romero Fern\'{a}ndez, Jacobo", publisher = "[S.l] : [s.n.]", editor = "[s.n.]", URL = "https://bibliotecadigital.jcyl.es/es/consulta/registro.do?id=11506", year = "1935", }