1.
Reflections on the Spirituality of Gregorian Chant
by Hourlier, Jacques, Pugsley,...
ISBN: 9781557250964
List Price: $13.99
2.
Overview of Gregorian Chant: XVI of Etudes Gregoriennes
by Cardine, Dom E., Casprini, ...
ISBN: 9781557250551
List Price: $11.99