First printing (1970). Not ex-library. The pages are yellowing, but it's still in good condition. Minimal markings inside. This description may be from another edition of this product.
As a mathematical psychologist, I know a good textbook on the subject when I read it. This book is simply top notch. I cannot think of any book that best condenses the discipline as this masterpiece. Sure, its old and the science itself has progressed quite a bit, but the basic theory is there and explained particularly well. A must for any student of mathematical psychology.
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