References
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- Kagan , J. , Rosman , B. L. , Day , D. , Albert , J. and Phillips , W. 1964 . Information processing in the child: Significance of analytic and reflective attitudes . Psychol. Monog. , 78 ( 1 ) Whole No. 578
- Tiegs , E. W. and Clark , W. W. 1957 . California Achievement Tests Complete Battery , Los Angeles : Calif. Test Bur. .