[Nikolai Evgen'evich Vvedenskii; 100th anniversary of birth].
D000846:Anniversaries and Special Events; D049672:History, 19th Century; D049673:History, 20th Century; D036801:Parturition
BIOGRAPHY
Nikolai Evgen'evich Vvedenskii; k 100-letiiu so dnia rozhdeniia.