1. The concept of dyslexia;M, I.Rutter;(Clinics in Developmental Medicine; foir better learning,1969
2. Congenital word-blindness;Hinshelwood, J.,1917
3. Specific reading disability-strephosymbolia;Orton, S.T.;JAMA
4. Backwardness in reading;Vernon, MD,1958
5. Dsysleria: theory anid research;Vellutino, FR,1979