Regulation of dental hygiene practice in Michigan 1923-present. Chronologically speaking....
D002910:Chronology as Topic; D003756:Dental Hygienists / Q000266:history* / Q000331:legislation & jurisprudence*; D049673:History, 20th Century; D006801:Humans; D008824:Michigan; D013044:Specialty Boards / Q000331:legislation & jurisprudence