Burt, Cyril. The backward child / Cyril Burt. - 3rd ed. - London : University of London press, 1951. - Vols. ; 22 cm. - The sub-normal school-child. . Include index. V. 2-- ; 337 337 Subjects--Topical Terms: Exceptional children.Child Psychology. Dewey Class. No.: 136.76 / B95b