Alain Daniélou - Northern Indian Music, Volume One: Theory & Technique [1949]

Alain Daniélou - Northern Indian Music, Volume Two: The Main Rāgăs [1949]

Rex Weyler and Bill Gannon - The Story of Harmony

Kathleen Schlesinger - The Greek Aulos [1939, 1970]

Shakuhaki Design: Excellent Guide to Flutes

The Healing Power of Music

Alexander J. Ellis - On the Musical Scales of Various Nations (Journal of the Society of Arts for March 27, 1885, vol. xxxiii)

Roger N. Shepard - Geometrical Approximations to the Structure of Musical Pitch (Article) [1982]

Alfredo Capurso - The Circular Harmonic Temperament System - C.HA.S. ®

Alfredo Capurso - A New Model of Interpretation of Some Acoustic Phenomena. Circular Harmonic System – C.HA.S.

Handbook of Acoustics for the Use of Musical Students (8th Ed) - Thomas Frederick Harris

Bruno Nettl - Infant Musical Development and Primitive Music

Tibetan Singing Bowls - Denis Terwagne and John W.M. Bush

Revive Verdi's tuning to bring back great music (EIR Feature Article)

Dane Rudhyar - The Relativity of Our Musical Conceptions