title: [Specialization and improvement of dental staff in Bulgaria for the years 1951-1975].
mesh_terms: D002031:Bulgaria; D004499:Education, Dental, Graduate / Q000639:trends*; D013039:Specialties, Dental; D000078329:Workforce
vernacular_title: Spetsializatsiiata i usuvurshentstvuvaneto na stomatologichnite kadri v Bulgariia za perioda 1951-1975 g.