@book
{TN_libero_mab2,
author = {
Dilich, Wilhelm
Michaelis, Carl
AND
Krollmann, Christian
AND
Ebhardt, Bodo
},
title = {
Rheinische Burgen
},
publisher = {Ebhardt},
year = {19XX-},
address = {
Berlin
},
url = {
http://slubdd.de/katalog?TN_libero_mab2
}
}