@book{UBHD-1481774, author={Beethoven, Ludwig van}, title={Hefte 77 - 90}, publisher={Dt. Verl. f{\"u}r Musik}, address={Leipzig}, year={1978}, pages={441 S.}, language={ger}, library={UB [Signatur: 84 A 2403::7] ; MU [Signatur: D 1539 a]}, }