Columbia subject headings:
Klais, Johannes, 1852-1925.
Organ (Musical instrument)--Construction--Germany.
Organ builders--Germany.
Orgelbau Johannes Klais (Firm)
Harvard subject headings:
Klais, Johannes, 1852-1925.
Organ (Musical instrument)--Construction--Germany.
Organ builders--Germany.
Orgelbau Johannes Klais (Firm)
Princeton subject headings:
Klais, Johannes, 1852-1925.
Organ (Musical instrument)--Construction--Germany.
Organ builders--Germany.
Orgelbau Johannes Klais (Firm)