References
- Bodin , M. 1936 . Do problem children become delinquent and criminal? . J. Crim. Law & Criminol , 27 : 345 – 559 .
- Cronbach , L. J. 1943 . On estimates of test reliability . J. Educ. Psychol. , 34 : 485 – 494 .
- Dale , E. and Choll , J. S. 1948 . A formula for predicting readability: Instructions Educational Research Bulletin, College of Education, Ohio State University
- Kelley , T. L. 1935 . The Kelley Statistical Tables , New York : American Book .
- Peters , C. C. and Van Voorkis , W. R. 1940 . Statistical Procedures and Their Mathematical Bases , New York : McGraw-Hill .
- Zakolski , F. C. 1949 . Studies in delinquency: II. Personality structure of delinquent boys . J. Genet. Psychol. , 74 : 109 – 117 .
- Zakolski , F. C. 1949 . Studies in delinquency: II. Prediction of delinquency in boys . J. Genet. Psychol. , 74 : 119 – 123 .
- Zubin , J. 1939 . Nomograph for the determining of the significance of the difference between the frequencies of events in two contrasted series or groups . J. Amer. Stat. Assos. , 34 : 359 – 344 .