25 Progressive Studies, Op. 100
25 Selected Sonatas
25 Sizzling Singles Latin Pop Hits Book
25 Studies for Piano Op. 47
25 Studies for Rhythm & Expression Op. 47
25 Studies for Rhythm and Expression, Op. 47
25 Studies Op. 176 & School Mechanism 15 Studies Op. 120
25 Studies Op. 38
25 Studies Op. 45
