Anastasi, Anne, 1908-2001. Differential psychology : individual and group differences in behavior / Anne Anastasi and John P. Foley, Jr. - Rev. ed. - New York : Macmillan Co., c1949 [Reprinted 1956]. - xv, 894 p. : ill. ; 22 cm. Includes index. Subjects--Topical Terms: Difference (Psychology)Psychophysiology. Dewey Class. No.: 136 / AND 1956