USED LITERATURE
1. Judy Hall: Crystal Bible
2. Judy Hall: The Crystal Bible Volume 2.
3. Judy Hall: The Crystal Bible Volume 3.
4. Sonja Heider: Handbuch der Heilsteine
5. Shalila Sharamon, Bodo J. Baginski: Das Chakra-Handbuch
6. Julia & Derek Parker: Astrology
7. Kenneth Meadows: Rune Power. The Secret Knowledge of the Wise Ones