The Philosophy of 'As If': A System of the Theoretical, Practical ...
Hans Vaihinger
Toward a Calculus of Concepts
Willard van Orman Quine
Studies in Word-Association; experiments in the diagnosis of ...
C. G. Jung
Five Practices for Orchestrating Productive Mathematical Discussion
Margaret S. Smith & Mary Kay Stein
Tim R. Swartz - The Lost Journals of Nikol
Chemtrails
The Permanent Revolution & Results and Prospects
Leon Trotsky