1. Analysis of bilirubin survey;Westphal;Pediatrics,1962
2. Mental growth during the first three years: A developmental study of 61 children by repeated tests;Bayley;Genet. Psychol. Monogr.,1933
3. The Apgar score as an index of neonatal mortality. Report from the Collaborative Study of Cerebral Palsy;Drage;Obst. & Gynec.,1964
4. Some methods for strengthening the common chi-square tests;Cochran;Biometrics,1954