@misc
{TN_libero_mab2,
author = {
Hertzka, Emil
Universal-Edition A.G. <Wien>
Busoni, Ferruccio
},
title = {
Brief an Ferruccio Busoni : 22.06.1923
},
publisher = {},
year = {22.06.1923},
address = {
Wien
},
url = {
http://slubdd.de/katalog?TN_libero_mab2
}
}