@book
{TN_libero_mab2,
author = {
Bitter, Carl Hermann
},
title = {
Johann Sebastian Bach
},
publisher = {Zentralantiquariat d. DDR},
keywords = {
Bach, Johann Sebastian
},
year = {18XX-},
address = {
Leipzig
},
url = {
http://slubdd.de/katalog?TN_libero_mab2
}
}