Music Theory in 1985

Chords and Keys: Level 2 (for Individual or Group Instruction) by Glover, David Carr, Clark, Mary Elizabeth

Classic Guitar Technique -- Supplement 2: Basic Elements of Music Theory for the Guitar by Shearer, Aaron

The Basic Guide to How to Read Music by Cooper, Helen

Realism in Nineteenth-Century Music by Dahlhaus, Carl

Music and Trance: A Theory of the Relations Between Music and Possession by Rouget, Gilbert