[Environmental hygiene on the 60th anniversary of the Soviet government].
D004782:Environmental Health; D004787:Environmental Pollution / Q000517:prevention & control; D049673:History, 20th Century; D007878:Legislation as Topic / Q000266:history; D014586:USSR
Gigiena okruzhaiushcheĭ sredy k 60-letiiu Sovetskogo gosudarstva.