Translation: -Sconosciuti Books Jazz Other-.
Translation: The Harmony Musical Theory Y.
Translation: Theory and Modern Harmony.
Translation: Musical Theory Y Harmony II.
Translation: Harmony and Theory.
Translation: Manual of Harmony and Theory. Practice.
Translation: Six Strings. Six Strings composed by Gustavo Gregorio. Book .
Translation: Four Strings. Four Strings composed by Gustavo Gregorio. Book .
Translation: Functional Harmony. Functional Harmony. Issues of basic music theory and practic. Book . Spanish. Published by Ediciones Musicales Melos.
