1. Orton, S. T.: Reading, Writing and Speech Problems in Children. N. Y., Norton, 1937. (reprinted 1961)
2. Hallgren, B.: Specific dyslexia. Acta psychiat. Scand. Suppl. 65, 1950.
3. Gallagher, J. R.: Specific language disability (dyslexia). Clin. Proc. Child. Hosp. (Boston) 16:3–5, 1960.
4. Rabinovitch, R. D., and Ingram, W.: Neuro-psychiatric considerations in reading retardation. Reading Teacher 15:433–438, 1961–1962.
5. de Hirsch, K.: Specific dyslexia or strephosymbolia. Folia phoniat. (Basel) 4:231–243, 1952.