[The first All-Union Congress of District Physicians].
Petrov
B D
BD
D003226:Congresses as Topic / Q000266:history*; D049673:History, 20th Century; D009031:Moscow; D011634:Public Health / Q000266:history*; D014586:USSR
Pervyĭ Vsesoiuznyĭ s"ezd uchastkovykh vracheĭ.