@Book{BVMC:715985,
author = {Ackermann, Rudolph},
title = {Carta de Rudolph Ackermann a José del Valle. Londres, 4 de octubre de 1826},
publisher = {Alicante : Biblioteca Virtual Miguel de Cervantes, 2015},
year = {2015},
url = {https://www.cervantesvirtual.com/nd/ark:/59851/bmc9k673}
}