@Book{BVMC:703314, author = {Calderón, E.}, title = {[Carta de E. Calderón a Francisco I. Madero. Eagle Pass (E.U.A.), 13 de abril de 1911]}, publisher = {Alicante : Biblioteca Virtual Miguel de Cervantes, 2014}, year = {2014}, url = {https://www.cervantesvirtual.com/nd/ark:/59851/bmc515v4} }