Oliver and Boyd, 1948 14 x 22, 566 pp., 38 tableaux, 12 illustrations, tests et hors-texte, cartonnage, éditeur, Bon état - annotations au crayons, 4e édition
The problem. Individual differences and their bearing on backwardness. The nature of backwardness. Selection of cases of specific backwardness. - Distribution of cases and general characteristics. Diagnosis of specific backwardness. Ability in reading. Di