@Book{BVMC:683934, author = {Altamira, Rafael}, title = {Carta de Rafael Altamira a Ramón Prieto. Madrid, 28 de abril de 1929}, publisher = {Alicante : Biblioteca Virtual Miguel de Cervantes, 2014}, year = {2014}, url = {https://www.cervantesvirtual.com/nd/ark:/59851/bmc5h9c1} }