@Book{BVMC:710284, author = {Echegaray, Carmelo de}, title = {Tarjeta postal de C. de Echegaray a Rafael Altamira. 30 de agosto de 1907}, publisher = {Alicante : Biblioteca Virtual Miguel de Cervantes, 2015}, year = {1907}, url = {https://www.cervantesvirtual.com/nd/ark:/59851/bmc641m0} }