title: [History of orthodontics: education, publications, professional organizations in the first half of the XX century].
authors.forename: L S
authors.initials: LS
authors.lastname: Persin
authors.forename: M Ia
authors.initials: MIa
authors.lastname: Alimova
mesh_terms: D049673:History, 20th Century; D009970:Orthodontics / Q000193:education / Q000266:history* / Q000458:organization & administration; D011642:Publications / Q000266:history*; D012425:Russia (Pre-1917); D012575:Schools, Dental / Q000266:history* / Q000458:organization & administration; D012953:Societies, Dental / Q000266:history* / Q000458:organization & administration; D014586:USSR