@book
{TN_libero_mab2,
author = {
Humboldt, Alexander von
Wegener, Wilhelm G.
AND
Leitzmann, Albert
},
title = {
Jugendbriefe Alexander von Humboldts an Wilhelm Gabriel Wegener
},
publisher = {Göschen},
year = {1896},
abstract = {In Fraktur},
address = {
Leipzig
},
url = {
http://slubdd.de/katalog?TN_libero_mab2
}
}