References
- Davis , Hallowell , ed. 1947 . Hearing and deafness: A guide for laymen , New York : Murray Hill Books .
- Fiedler and Miriam , F. 1951 . A study of the socioeconomic status of a group of public school children with hearing defects . Child Development , 22 : 193 – 198 .
- McNemar , Quinn. 1949 . Psychological statistics , 225 – 226 . New York : Wiley .