@book{UBHD-1481775, author={Beethoven, Ludwig van}, title={Hefte 91 - 103}, publisher={Dt. Verl. f{\"u}r Musik}, address={Leipzig}, year={1981}, pages={428 S.}, language={ger}, library={UB [Signatur: 84 A 2403::8] ; MU [Signatur: D 1539 a]}, }