Fonti a stampaBach, Carl P.: [Leite mich nach deinem Willen]
Georg Johann Daniel Poelchau, 1773 - 1836Musician and collector of music [The New York Public Library Digital Collection, Joseph Muller Collection of Music and Other Portraits / https://digitalcollections.nypl.org/items/510d47e2-9def-a3d9-e040-e00a18064a99 -- Public domain -- http://commons.wikimedia.org/wiki/File:Georg Johann Daniel Poelchau.jpg]