Columbia subject headings:
Gebrüder Alexander.
Mainz (Rhineland-Palatinate, Germany)--Biography.
Wind instrument makers--Germany--Mainz (Rhineland-Palatinate)--Biography.
Harvard subject headings:
Gebrüder Alexander.
Mainz (Rhineland-Palatinate, Germany)--Biography.
Wind instrument makers--Germany--Mainz (Rhineland-Palatinate)--Biography.
Princeton subject headings:
Gebrüder Alexander (Firm).
Musical instruments--History.