Columbia subject headings:
Blüthner (Firm)--History.
Leipzig (Germany)--Commerce--England.
Piano makers--Germany--Leipzig--History.
Piano--Construction--Germany--Leipzig.
Harvard subject headings:
Blüthner (Firm)--History.
Musical instruments industry--Germany--Leipzig--History--19th century.
Piano makers--Germany--Leipzig--History--19th century.
Piano--Construction--England--History--19th century.
Piano--Construction--France--History--19th century.
Piano--Construction--Germany--History--19th century.
Princeton subject headings:
Blüthner (Firm)--History.
Leipzig (Germany)--Commerce--England.
Piano makers--Germany--Leipzig--History.
Piano--Construction--Germany--Leipzig.