@Book{BVMC:931857, author = {Nieto Caballero, Agustín}, title = {Carta de Agustín Nieto Caballero a Rafael Altamira. Bogotá, 7 de abril de 1920}, publisher = {Alicante : Biblioteca Virtual Miguel de Cervantes, 2018}, year = {2018}, url = {https://www.cervantesvirtual.com/nd/ark:/59851/bmc0931857} }