Columbia subject headings:
Harvard subject headings:
Deutsches Museum (Germany)--Catalogs.
Phonograph--Equipment and supplies--Catalogs.
Phonograph--Germany--Catalogs.
Phonograph--Germany--History.
Princeton subject headings:
Catalogs.
Deutsches Museum (Germany)--Catalogs.
Phonograph--Germany--Munich--Catalogs.
Phonograph--History.
Sound--Recording and reproducing--History.