@book
{TN_libero_mab2,
author = {
Mattson, Philip
},
title = {
Verzeichnis des Briefwechsels Wilhelm von Humboldts
2
},
publisher = {Wilhelm-von-Humboldt-Briefarchiv},
year = {1980},
address = {
Heidelberg
},
url = {
http://slubdd.de/katalog?TN_libero_mab2
}
}