Out of print, price predation, or otherwise unavailable…

2. The Theory of Classical Greek Music
Fritz A. Kuttner with the assistance of J. Murray Barbour
Harpsichord: Robert Conant
Musurgia Records, Theory series A, no. 1 1955

1. Meantone Temperament in Theory and Practice
J. Murray Barbour, Fritz A. Kuttner, Robert Conant (harpsichord)
Musurgia Records, Theory series A, no. 2 1958