Abstract
Journal Article PROCEEDINGS OF THE SOCIETY OF HYGIENE OF THE SCHOOL OF HYGIENE AND PUBLIC HEALTH OF THE JOHNS HOPKINS UNIVERSITY Get access American Journal of Epidemiology, Volume 5, Issue 4, 1 July 1925, Pages 553–558, https://doi.org/10.1093/oxfordjournals.aje.a119680 Published: 01 July 1925
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