Vocal exercise and nineteenth-century hygiene in France.
D002648:Child; D005602:France; D006173:Gymnastics / Q000266:history*; D049671:History, 18th Century; D049672:History, 19th Century; D006801:Humans; D006920:Hygiene; D008171:Lung Diseases / Q000517:prevention & control; D005082:Physical Exertion; D014834:Voice Training