Hardyck, Curtis D. Introduction to statistics for the behavioral sciences / Curtis D. Hardyck and Lewis F. Petrinovich. - 2nd ed. - Philadelphia: Saunders, 1976. - viii, 336 p. : ill. ; 26 cm. - Saunders books in psychology . Includes index. ISBN: 0721645216 Subjects--Topical Terms: PsychometricsSociometric TechnicsΨυχολογία--Μεθοδολογία Dewey Class. No.: 155.72