[On the occasion of A. N. Sysin's 125th birthday].
Vasil'ev
K G
KG
Vasil'ev
Iu N
IuN
D004813:Epidemiology / Q000266:history*; D006296:Health Services / Q000266:history*; D049672:History, 19th Century; D049673:History, 20th Century; D049674:History, 21st Century; D012426:Russia