books.google.com - This January 1, 2011, version 3.1 edition of the Book of Readings now features Comments, Frontispiece, and the Editor 's preface from "Dialogue Concerning the Two Chief Approaches to a Science of Life." It is designed to be a broad-based sampling of the literature on Perceptual Control Theory, PCT, its...http://books.google.com/books/about/Perceptual_Control_Theory.html?id=8JTYR3wiUMgC&utm_source=gb-gplus-sharePerceptual Control Theory
