Columbia subject headings:
Keyboard instrument music--Germany--History and criticism.
Keyboard players--Germany--History.
Musicians--Germany--Social conditions.
Organists--Germany--History.
Harvard subject headings:
Keyboard instrument music--Germany--History and criticism.
Keyboard players--Germany--History.
Musicians--Germany--Social conditions.
Organists--Germany--History.
Princeton subject headings:
Keyboard instrument music--Germany--History and criticism.
Keyboard players--Germany--History.
Musicians--Germany--Social conditions.
Organists--Germany--History.
Piano--Germany--History and criticism.