Columbia subject headings:
Hauptkirche St. Michaelis (Hamburg, Germany)--Organs.
Organ (Musical instrument)--Germany--Hamburg.
Organ builders--Germany--Hamburg.
Harvard subject headings:
Hauptkirche St. Michaelis (Hamburg, Germany)--Organ.
Hauptkirche St. Michaelis (Hamburg, Germany)--Organs.
Organ (Musical instrument)--Germany--Hamburg.
Princeton subject headings:
Hauptkirche St. Michaelis (Hamburg, Germany)--Organ.
Organ (Musical instrument)--Construction.
Organ (Musical instrument)--Germany (West)--Hamburg.