[50 years since the organization of the Leningrad branch of the All-Russian Society of Hygienists and Sanitary Physicians].
D049673:History, 20th Century; D006920:Hygiene; D011634:Public Health / Q000266:history; D012955:Societies, Medical / Q000266:history*; D014586:USSR
50 let organizatsii Leningradskogo otdeleniia Vserossiĭskogo nauchnogo obshchestva gigienistov i sanitarnykh vracheĭ