title: Dental Postcards LV. Dr. Ernest A Carpenter: an early advocate of preventive dentistry.
authors.forename: Arden G
authors.initials: AG
authors.lastname: Christen
authors.forename: Joan A
authors.initials: JA
authors.lastname: Christen
mesh_terms: D000329:Advertising / Q000266:history*; D015709:Correspondence as Topic / Q000266:history; D049673:History, 20th Century; D011313:Preventive Dentistry / Q000266:history*; D014481:United States