 |
| Prof. Dr. David Hiley Institut für Musikwissenschaft Universität Regensburg |
 |
Dom Daniel Saulnier, O.S.B. Director of Paleography at St. Pierre Abbey Professor of Gregorian Chant |
 |
| +Dr. Theodore Marier (1912-2001) Founder, Boston Archdiocesan Choir School Director, International Center for Ward Studies The Catholic University of America |
