Nc 6 / 1970 Musi
Ringer, Alexander L.: Beethoven and the London Pianoforte School. – 1970. – Notenbeisp.
In: The musical quarterly. – 56 (1970), S. 742-758
Inv.-Nr. 10680
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Nm 3 / 1971 Lang
Ringer, Alexander L.: Beethoven and the London pianoforte school / by Alexander L. Ringer. – 1971. – Zahlr. Notenbeisp.
In: The creative world of Beethoven. – New York, NY : W. W. Norton, 1971. – S. 240-256
Inv.-Nr. 11242