Ludwig van Beethoven, Brief an Breitkopf & Härtel in Leipzig https://www.beethoven.de/de/media/view/4847922684362752/Ludwig+van+Beethoven%2C+Brief+an+Breitkopf+%26+H%C3%A4rtel+in+Leipzig%2C+Wien%2C+18.+April+1805?fromArchive=5655528168488960
Ludwig van Beethoven, Brief an Breitkopf & Härtel in Leipzig
Ludwig van Beethoven, Brief an Breitkopf & Härtel in Leipzig