Authors: Isador Hirschfeld

  • The Toothbrush, Its Use And Abuse A Treatise On Preventive Dentistry And Periodontia As Related To Dental Hygiene — Isador Hirschfeld

    The Toothbrush, Its Use And Abuse A Treatise On Preventive Dentistry And Periodontia As Related To Dental Hygiene — Isador Hirschfeld