Gurdjieff - Ouspensky

Bennett, J.G. Is there lifeon earth. An introduction to Gurdjieff

Gurdjieff - Ouspensky

Bennett, J.G. The Crisis in human affairs

Gurdjieff - Ouspensky

Jan And Kyroot Said. Contemporary work Commentaries ( by the author of Dialogues of Gurdjieff)

Gurdjieff - Ouspensky

Ouspensky, P.D. De Psychologie van s mensen mogelijke evolutie