Columbia subject headings:
Harvard subject headings:
Henfling, Conrad, 1648-1716.
Leibniz, Gottfried Wilhelm, Freiherr von, 1646-1716
Music theory--Early works to 1800.
Music theory--History--17th century.
Music--Acoustics and physics
Music--Acoustics and physics--Early works to 1800
Musical intervals and scales.
Philosophers--Germany--Correspondence
Philosophers--Germany--Correspondence--Early works to 1800.
Princeton subject headings:
Henfling, Conrad, 1648-1716.
Leibniz, Gottfried Wilhelm, Freiherr von, 1646-1716.
Music theory--Early works to 1800.
Music--Acoustics and physics--Early works to 1800.
Philosophers--Germany--Correspondence--Early works to 1800.