[50th anniversary of the organs of the sanitary epidemiological service of the USSR].
D004813:Epidemiology / Q000266:history*; D049673:History, 20th Century; D006920:Hygiene; D012499:Sanitation / Q000266:history*; D014586:USSR
50-letie organov sanitarno-epidemiologicheskoi sluzhby SSS.