Fricke, F., Hamel, P. M., Hartmann, T. d., Otte, H., Riley, T., Henck, H., . . . Scriabin, A. N. (1986). Keys of life: Piano music from Celestial Harmonies. [Place of publication not identified]: Celestial Harmonies.

Fricke, Florian, Peter Michael Hamel, Thomas de Hartmann, Hans Otte, Terry Riley, Herbert Henck, Cecil Lytle, Georges Ivanovitch Gurdjieff, and Aleksandr Nikolayevich Scriabin. Keys of Life: Piano Music From Celestial Harmonies. [Place of publication not identified]: Celestial Harmonies, 1986.

Fricke, Florian, et al. Keys of Life: Piano Music From Celestial Harmonies. [Place of publication not identified]: Celestial Harmonies, 1986.