Columbia subject headings:
Composers--Germany--Biography.
Organ builders--Germany--Biography.
Töpfer, Johann Gottlob, 1791-1870.
Harvard subject headings:
Composers--Germany--Biography
Organ builders--Germany--Biography.
Töpfer, Johann Gottlob, 1791-1870
Princeton subject headings:
Composers--Germany--Biography.
Organ builders--Germay--Biography.
Töpfer, Johann Gottlob, 1791-1870.