Apocalypticism and Mysticism in Ancient Judaism and Early Christianity ...
John Joseph Collins & Adela Yarbro Collins & John J. Collins & Pieter G. R. Villiers & Pieter de Villiers
Logic Programming, Knowledge Representation, and Nonmonotonic ...
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Balanced Man
Fritz Peters
Logic and Arithmetic
David Bostock
The Philosophy of Freedom
Rudolf Steiner
The Essentials of Spirituality
Felix Adler
Hymns to an unknown God : awakening the spirit in everyday life
Sam Keen