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2. McCarthy Dorothea A. The language development of the preschool child. University of Minnesota Institute of Child Welfare Monog. Ser. No. 4. Minneapolis Minnesota: University of Minnesota Press 1930. Pp. XIII 174.
3. A revision of the Smith vocabulary test for preschool children. (In) Williams, Harold M., McFarland, Mary L., and Little, Marguerite F., Development of Language and Vocabulary in Young Children. Univ. Iowa Stud;Williams Harold M;Stud. in Child Welfare,1937
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