Neil A.Kjos Music Company Siebenhüner Musikverlag Musik Theorie Band 2
Siebenhüner Musikverlag Musik Theorie Band 2, Reference Book on Music Theory, Part 2 of Music Theory, By Charles S. Peters and Paul Yoder, 31st to 60th lessons, ISBN: 9780849704789, Publisher's no. SIEB 22012, Format: DIN A4, 32 Pages, In German language