@book
{TN_libero_mab2,
author = {
De Terra, Helmut
De Terra, Helmut
},
title = {
Alexander von Humboldt und seine Zeit
},
publisher = {Brockhaus},
keywords = {
Humboldt, Alexander von
},
year = {1956},
address = {
Wiesbaden
},
url = {
http://slubdd.de/katalog?TN_libero_mab2
}
}