PDF) Gurdjieff and Music: The Gurdjieff/de Hartmann Piano Music and its Esoteric Significance | Johanna Petsche - Academia.edu
Sacred Honey | Alessandra Celletti
Gurdjieff / De Hartmann – The Music Of Gurdjieff / De Hartmann (1985, Vinyl) - Discogs
GURDJIEFF / DE HARTMANN: COMPLETE MUSIC FOR THE PIANO - Klassiek.nl
Gurdjieff - De Hartmann Piano Music - YouTube
Thomas De Hartmann Discography | Discogs
Thomas de Hartmann: A Composer's Life
The Music of Gurdjieff / de Hartmann
Fabulous de Hartmann Premieres on Toccata from Kuchar and the Lviv Philharmonic - Classics Today
The Thomas de Hartmann Project
Why Has Ukranian Composer Thomas de Hartmann Been So Neglected?
Olga und Thomas de Hartmann: Biografien | Chalice Verlag
Why Has Ukranian Composer Thomas de Hartmann Been So Neglected?
Thomas De Hartmann music, videos, stats, and photos | Last.fm
Thomas de Hartmann on Apple Music
Gurdjieff - De Hartmann Piano Music - YouTube
On Olga de Hartmann
Why Has Ukranian Composer Thomas de Hartmann Been So Neglected?
On Olga de Hartmann
Hartmann's operation - Wikipedia
Thomas de Hartmann - Vrije Geluiden - VPRO
