@misc
{TN_libero_mab2,
author = {
Beethoven, Ludwig van
Singer, Otto
},
title = {
Septett
op. 20
},
edition = {
für Klavier zu 2 Händen übert.
}
,
publisher = {Peters},
year = {1958},
address = {
Leipzig
},
url = {
http://slubdd.de/katalog?TN_libero_mab2
}
}