Maximum Principles on Riemannian Manifolds and Applications
Stefano Pigola & Marco Rigoli & Alberto Giulio Setti
No Boundary: Eastern and Western Approaches to Personal Growth
Kenneth E. Wilber
Studies in Reflecting Abstraction
Jean Piaget & Robert L. Campbell
The Fueless Engine
Richard Stettenbenz
La Fabrication De La Science
Alan Francis Chalmers
Metaphysics - Aristotle
Aristotle