Forgus, Ronald H. Perception; the basic process in cognitive development [by] Ronald H. Forgus. - New York, McGraw-Hill [1966] - McGraw-Hill series in psychology . Bibliography: p. 361-389. LCCN: 65025917 Subjects--Topical Terms: Perception. LC Class. No.: BF311 / .F58 Dewey Class. No.: 153.7