@misc
{TN_libero_mab2,
author = {
Beethoven, Ludwig van
Ulrich, Hugo
},
title = {
Ludwig van Beethoven's Concerte
},
edition = {
Für Piano zu vier Händen
}
,
publisher = {Leuckart},
year = {18XX-},
address = {
Leipzig
},
url = {
http://slubdd.de/katalog?TN_libero_mab2
}
}