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Selwyn D. Collins, E. Ruth Phillips, Dorothy S. Oliver, Age Incidence of Specific Causes of Illness Found in Monthly Canvasses of Families: Sample of the Eastern Health District of Baltimore, 1938-43, Public Health Reports (1896-1970), Vol. 66, No. 39 (Sep. 28, 1951), pp. 1227-1245
Collins et al. (Mon,) studied this question.