title: Obituary: Perry A. Ratcliff, DDS.
authors.affiliation: Rio Verde, AZ, USA.
authors.forename: Dick
authors.initials: D
authors.lastname: Oliver
authors.forename: Bob
authors.initials: B
authors.lastname: Wirthlin
mesh_terms: D049673:History, 20th Century; D049674:History, 21st Century; D006801:Humans; D010517:Periodontics / Q000266:history*; D012953:Societies, Dental / Q000266:history*; D014481:United States