Gurdjieff Reconsidered: The Life, the Teachings, the Legacy
Roger Lipsey
Moves in Mind: The Psychology of Board Games
Fernand Gobet & Alexander J. de Voogt & Jean Retschitzki
Eine Kindheit mit Gurdjieff
Fritz Peters
Structures: Or Why Things Don't Fall Down
J. E. Gordon
The Philosophy of Mysticism: Perennialism and Constructivism ...
Randolph T. Dible II
CIA Briefings of Presidential Candidates
John L. Helgerson