Tchaikovsky, Piotr Illyich and Shamazov, Liliya (ed. and trans.)
"Concise Manual of Harmony, Intended for the Reading of Spiritual Music in Russia (1874),"
Gamut: Online Journal of the Music Theory Society of the Mid-Atlantic: Vol. 7
, Article 3.
Available at: http://trace.tennessee.edu/gamut/vol7/iss1/3