author = { Beethoven, Ludwig van Kempff, Wilhelm },

title = { Sonate Nr. 21 in C-Dur (Waldsteinsonate) op. 53 },

publisher = {Deutsche Grammophon-Aktiengesellschaft},

keywords = { Schallplatte },

year = {[circa 1930]},

address = { Berlin },

url = { http://slubdd.de/katalog?TN_libero_mab2 }