title: [First Bulgarian dentists--pioneers of Bulgarian-Russian and Bulgarian Soviet friendship].
mesh_terms: D002031:Bulgaria; D003815:Dentists; D006665:History of Dentistry; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D007391:International Cooperation; D012425:Russia (Pre-1917); D014586:USSR
vernacular_title: Pervye bolgarskie zubnye vrachi--pionery bolgaro-russkoĭ i bolgaro-sovetskoĭ druzhby.