American Dental Hygienists' Association: 50 years of growth.
D000571:American Dental Association; D003756:Dental Hygienists / Q000266:history*; D049672:History, 19th Century; D049673:History, 20th Century; D009934:Organization and Administration; D009935:Organizational Affiliation; D012953:Societies, Dental / Q000266:history*; D014481:United States