@Book{BVMC:292678, author = {Llanos, Custodio}, title = {Carta de Custodio Llanos a Rafael Altamira. México, 12 de enero de 1910}, publisher = {Alicante : Biblioteca Virtual Miguel de Cervantes, 2012}, year = {2012}, url = {https://www.cervantesvirtual.com/nd/ark:/59851/bmcfn1t5} }