Columbia subject headings:
Harvard subject headings:
Mozart, Wolfgang Amadeus, 1756-1791--Friends and associates.
Zabuesnig, Johann Christoph von, 1747-1827.
Princeton subject headings:
Authors, German--18th century--Biography.
Mozart, Wolfgang Amadeus, 1756-1791.
Zabuesnig, Johann Christoph von, 1747-1827.