Modern editions of Rameau's work and other famous harmony treatises are available from major retailers. (Jean-Philippe Rameau) Revised edition by Dover Publications ($21.95). Also available at Books A Million ($21.95). Alfred Day's Treatise on Harmony (1845)
A historically controversial and complex work available at Books A Million ($40.00). (William Pole, 1883)
: Derives the entire harmonic system (chords and modes) from first principles.