Columbia subject headings:
Haydn, Joseph, 1732-1809.
Mendelssohn-Bartholdy, Felix, 1809-1847.
Harvard subject headings:
Haydn, Joseph, 1732-1809
Mendelssohn-Bartholdy, Felix, 1809-1847
Princeton subject headings:
Haydn, Joseph, 1732-1809.
Mendelssohn-Bartholdy, Felix, 1809-1847.