Humphrey, George, b. 1889. Thinking : an introduction to its experimental psychology / George Humphrey. - London : New York : Methuen ; Wiley, 1951. - xi, 331 p. : ill. ; 23 cm - Methuen's manuals of modern psychology . Bibliography: p. 316-324. - Includes index. Subjects--Topical Terms: Psychophysiology. Dewey Class. No.: 153 / HUT 1951