- AudiolibroGurdjieffClaudio Naranjo, M.D.
- AudiolibroPowers Of PerceptionCharles Tart, Ph.D.
- AudiolibroSpiritual Beings In A Material WorldCharles Tart, Ph.D.
- AudiolibroDiving Into The Pool Of ConsciousnessArthur Hastings, Ph.D.
- AudiolibroScientific Support for the Spiritual Dimension of LifeCharles Tart, Ph.D.