La teoría gregoriana, segun las enseñanzas del Abad Dom P.M. Ferretti. Curso medioPaolo Maria Ferretti · First published 1942Open the Tome
Esthétique grégorienne, ou, Traité des formes musicales du chant grégorienPaolo Maria Ferretti · First published 1990Open the Tome
Harmonia e ritmica nella musica anticaPaolo Maria Ferretti, Pellegrino Ernetti · First published 1969Open the Tome
Estetica gregoriana dei recitativi liturgici, a cura di Pellegrino M. ErnettiPaolo Maria Ferretti · First published 1964Open the Tome
Principii teorici e pratici di canto gregorianoPaolo Maria Ferretti · First published 1937Open the Tome
Papal documents on figured music from the 14th to the 20th century and Examples for demonstrationPaolo Maria Ferretti · First published 1927Open the Tome
Il cursus metrico e il ritmo delle melodie gregorianePaolo Maria Ferretti · First published 1913Open the Tome
