1. An analysis of errors in word recognition made by retarded readers;Bennett;J. Educ. Psychol,1942
2. Dyslexia in relation to form perception and directional sense;Benton,1962
3. The Backward Child;Burt,1950
4. Developmental Dyslexia;Critchley,1964
5. A study of the confusing letters B, D, P, and Q;Davidson;J. Genet. Psycho,1935