Gurdjieff / De Hartmann – The Music Of Gurdjieff / De Hartmann (1985, Vinyl) - Discogs
Why Has Ukranian Composer Thomas de Hartmann Been So Neglected? : Interlude
Gurdjieff's Music for the Movements - Channel Classics Records
The Thomas de Hartmann Project
Thomas de Hartmann | Spotify
On Olga de Hartmann
Thomas de Hartmann Project - Home | Facebook
Thomas de Hartmann | Spotify
Thomas De Hartmann music, videos, stats, and photos | Last.fm
Thomas De Hartmann | Light In The Attic Records
Thomas de Hartmann (Composer, Arranger) - Short Biography
Thomas de Hartmann - Wikipedia
Gurdjieff / De Hartmann - Holy Affirming, Holy Denying, Holy Reconciling - YouTube
![Gurdjieff / De Hartmann - Persian Song [AUDIO] - YouTube](https://i.ytimg.com/vi/CKghwBTXbWA/hqdefault.jpg "Gurdjieff / De Hartmann - Persian Song [AUDIO] - YouTube")
Gurdjieff / De Hartmann - Persian Song [AUDIO] - YouTube
Thomas de Hartmann on Apple Music
The Thomas de Hartmann Project
The Music Of Gurdjieff / De Hartmann | Light In The Attic Records
Thomas de Hartmann
Thomas de Hartmann | Spotify
Why Has Ukranian Composer Thomas de Hartmann Been So Neglected? : Interlude
Thomas de Hartmann (1885-1956) : "Rituals of a Sufi Order" piano (3 extracts) - YouTube
PDF) Gurdjieff and Music: The Gurdjieff/de Hartmann Piano Music and its Esoteric Significance | Johanna Petsche - Academia.edu
The Gurdjieff Legacy Foundation Archives
Gurdjieff / De Hartmann: Complete Music for the Piano - YouTube
The Thomas de Hartmann Project
Thomas de Hartmann (Composer, Arranger) - Short Biography
Gurdjieff / De Hartmann: Complete Music for the Piano - Brilliant Classics
Olga und Thomas de Hartmann: Biografien | Chalice Verlag
