| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Spirituality As Insight: Mystical Texts and Theological Reflections | 978-9O-429-1451-3 (9O-429-1451-3) | 2004 |
F. A. Maas · F M. · Flip Maas · Franck Maas · Frank Maas · Frederica Sagor Maas · Fritz Maas · James/ Feldman Maas