Escuela de la velociadad Czerny. nº 11
https://www.noteflight.com/embed/0f15e265adafc0abe9e8ee9cff21c816b59681c0?scale=1
Tonalidades, acordes, escalas, voicing, dibyjos musicales,
https://www.noteflight.com/embed/0f15e265adafc0abe9e8ee9cff21c816b59681c0?scale=1