[Petr Grigor'evich Sergiev--statesman, scientist and human being (on the centenary of his birth)].
D049673:History, 20th Century; D010274:Parasitology / Q000266:history; D014586:USSR
Petr Grigor'evich Sergiev--gosudarstvennyĭ deiatel', uchenyĭ, chelovek (k 100-letiiu so dnia rozhdeniia).