@book
{TN_libero_mab2,
author = {
Humboldt, Alexander von
},
title = {
Alexander von Humboldt
},
publisher = {},
year = {1959},
abstract = {Als Ms. gedr},
booktitle = {Referentenmaterial ; 1},
address = {
[s.l.]
},
url = {
http://slubdd.de/katalog?TN_libero_mab2
}
}