Early educational tracts helped to build chiropractic.
Willis
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D002648:Child; D002675:Child, Preschool; D002684:Chiropractic / Q000266:history*; D006266:Health Education / Q000266:history*; D049673:History, 20th Century; D006801:Humans; D007223:Infant; D007224:Infant Care / Q000266:history*; D008370:Manuals as Topic; D014481:United States