Categories and Concepts
Edward E. Smith & Douglas L. Medin & Louis W Menk Professor Of Psychology Douglas L Medin
Dimensional Analysis
Percy Williams Bridgman
John G. Bennett's Talks on Beelzebub's Tales
John Godolphin Bennett & Anthony George Edward Blake
Philosophy of Existence
Karl Jaspers
Four Colors Suffice: How the Map Problem Was Solved
Ian Stewart & Robin Wilson
Cunningham's Encyclopedia of Magical Herbs
Scott Cunningham