Columbia subject headings:
Organ (Musical instrument)
Organ builders.
Schweitzer, Albert, 1875-1965.
Harvard subject headings:
Organ (Musical instrument)
Organ builders.
Schweitzer, Albert, 1875-1965.
Princeton subject headings:
Bach, Johann Sebastian, 1685-1750. Organ music.
Organ (Musical instrument)
Organ (Musical instrument)--Construction.
Schweitzer, Albert, 1875-1965--Criticism and interpretation.