1. A continuous study of hemolytic streptococci in the throats of normal school children in the city of Nemuro, Hokkaido;Maekawa;Sapporo Medical Journal,1977
2. Statistical aspects of the analysis of data from retrospective studies of disease;Mantel;Journal of the National Cancer Institute,1959
3. Statistical Methods for Rates and Proportions;Fleiss,1973
4. Relative risk of children attending kinder-garten to suffer from scarlet fever;Fukuda;Japanese Journal of Public Health,1976