@book
{TN_libero_mab2,
author = {
Becker, Horst J.
},
title = {
Bulgarien
Reiseführer
},
edition = {
3. Auflage
}
,
publisher = {Polyglott-Verlag},
year = {1970},
booktitle = {Polyglott-Reiseführer ; 761},
address = {
München
},
url = {
http://slubdd.de/katalog?TN_libero_mab2
}
}