@Book{BVMC:709794, author = {Allen, Robert W.}, title = {[Carta de Robert W. Allen a Francisco I. Madero. Donnellson (E.U.A.), 11 de mayo de 1911]}, publisher = {Alicante : Biblioteca Virtual Miguel de Cervantes, 2015}, year = {2015}, url = {https://www.cervantesvirtual.com/nd/ark:/59851/bmcf7877} }