Columbia subject headings:
Piano--Social aspects--Germany.
Popular instrumental music--Germany.
Harvard subject headings:
Music in the home
Music publishing--Germany.
Music--Germany--19th century--History and criticism
Piano music--19th century--History and criticism
Princeton subject headings:
Music in the home.
Music--Germany--19th century--History and criticism.
Music--Publishing--Germany.
Piano music--19th century--History and criticism.