@Book{BVMC:782542, author = {Porras Vega, Juan}, title = {Carta de Juan Porras Vega a Rafael Altamira. Matanzas (Cuba), 3 de marzo de 1910}, publisher = {Alicante : Biblioteca Virtual Miguel de Cervantes, 2017}, year = {2017}, url = {https://www.cervantesvirtual.com/nd/ark:/59851/bmcpp160} }