(Elementary duets, Dances and other pieces in various keys). By Kurt Sassmannshaus; Egon Sassmannshaus. For Viola. Barenreiter's Sassmannshaus. Instructional. Method book. Text language: English. 72 pages

By Andrew Surmani, Karen Farnum Surmani, And Morton Manus. For Alto Clef (Viola). Textbook - General. Essentials of Music Theory. Book and 2 CDs. 124 pages. Published by Alfred Publishing.

By Karen Farnum Surmani, Morton Manus, and Andrew Surmani. For Alto Clef (Viola). Textbook - General. Essentials of Music Theory. Book. 40 pages. Published by Alfred Publishing.

Alfred's Essentials of Music Theory. (Complete Book Alto Clef (Viola) Edition). By Andrew Surmani and Morton Manus. For Alto Clef (Viola). Reference Textbooks; Textbook - General; Theory. Essentials of Music Theory. Book. 124 pages. Published by Alfred Music Publishing

By William Starr. Edited by Judi Gowe. Summy-Birchard supplementary instruments (Viola). 84 pages. Published by Alfred Publishing.