@Book{BVMC:292793, author = {Ballesteros, Enrique}, title = {Carta de Enrique Ballesteros a Rafael Altamira. Buenos Aires, 2 de septiembre de 1909}, publisher = {Alicante : Biblioteca Virtual Miguel de Cervantes, 2012}, year = {2012}, url = {https://www.cervantesvirtual.com/nd/ark:/59851/bmcv7043} }