@book
{TN_libero_mab2,
author = {
Humboldt, Wilhelm von
Richter, Wilhelm
},
title = {
Wilhelm von Humboldts politische Briefe
},
publisher = {Behrs},
keywords = {
Briefsammlung
,
Humboldt, Wilhelm von
},
year = {19XX-},
address = {
Berlin
},
url = {
http://slubdd.de/katalog?TN_libero_mab2
}
}