- Tune Your Brain · 1997
- The Tradition of Gregorian Chant · 1969
- The Mystery of Santo Domingo de Silos · 1969
- The Mystery of Santo Domingo de Silos · 1969
- The Mystery of Santo Domingo de Silos · 1969
- The Mystery of Santo Domingo de Silos · 1969
- The Mystery of Santo Domingo de Silos · 1969
- The Mystery of Santo Domingo de Silos · 1969
- The Mystery of Santo Domingo de Silos · 1969
- The Mystery of Santo Domingo de Silos · 1969
- The Mystery of Santo Domingo de Silos · 1969
- The Mystery of Santo Domingo de Silos · 1969
- The Mystery of Santo Domingo de Silos · 1969