Tertium Organum: The Third Canon of Thought: a Key to the Enigmas of the World by P.D. Ouspensky

$55.00
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Routledge & Kegan Paul, 1981.
ISBN: 9780710006714. 298 pp.
Revised translation by E. Kadloubovsky and the author.
Hardcover. Near fine in a near fine jacket.