@Misc{BVMC:274010, author = {Olivares, Gaspar de Guzmán, Conde-Duque de}, title = {[Carta del Conde de Olivares al Card. Ludovicio, 11-11-1622].}, url = {https://www.cervantesvirtual.com/obra/carta-del-conde-de-olivares-al-card-ludovicio-11-11-1622} }