@Book{BVMC:789521, author = {Sáenz, Vicente}, title = {Carta de Vicente Sáenz, Unión Democrática Centroamericana, a Calos Esplá. México, 9 de febrero de 1943}, publisher = {Alicante : Biblioteca Virtual Miguel de Cervantes, 2017}, year = {2017}, url = {https://www.cervantesvirtual.com/nd/ark:/59851/bmc961k8} }