References
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- Eaves , L.C. , Kendall , D.C. and Crichton , J.U. 1974 . The Modified Predictive Index . Journal of Learning Disabilities , 7 : 632 – 638 .
- De Hirsch , K. , Jansky , J. and Langford , W . 1966 . Preventing reading failure , N.Y. : Harper & Row .