@Book{BVMC:724077, author = {Barras de Aragón, Francisco de las}, title = {Tarjeta postal de [Francisco de las] Barras a Rafael Altamira. [Londres, abril de 1909]}, publisher = {Alicante : Biblioteca Virtual Miguel de Cervantes, 2015}, year = {2015}, url = {https://www.cervantesvirtual.com/nd/ark:/59851/bmcn8957} }