1.
Beginner's Guide to Singing Gregorian Chant Notation, Rhythm and Solfeggio
by Jones, Noel, Jones, Ellen Doll
ISBN: 9781453692769
List Price: $21.95
2.
Singing Gregorian Chant Rhythm and Solfeggio
by Jones, Noel, Jones, Ellen Doll
ISBN: 9781453768761
List Price: $14.95