Bibliography of Hymns and Gregorian chant from the sixteenth century to 1991 - Hoon, Jos : de. (OLS)http://semarc/name/23069 (Hogeschool voor de Kunsten Utrecht,, 1996)
Keywords: Canto liturgico - Bibliografia. (OLS)http://semarc/subject/7112; Inni religiosi. (OLS)http://semarc/subject/5556; Canto gregoriano. (OLS)http://semarc/subject/2336