Rural school sanitation : including physical and mental status of school children in Porter County, Indiana / by Taliaferro Clark, Surgeon, United States Public Health Service, George L. Collins, Surgeon, United States Public Health Service, and W.L. Treadway, Assistant Surgeon, United States Public Health Service ; prepared by direction of the Surgeon General.

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Rural school sanitation : including physical and mental status of school children in Porter County, Indiana / by Taliaferro Clark, Surgeon, United States Public Health Service, George L. Collins, Surgeon, United States Public Health Service, and W.L. Treadway, Assistant Surgeon, United States Public Health Service ; prepared by direction of the Surgeon General. Public Domain Mark. Source: Wellcome Collection.