[Petr Aleksandrovich Gertsen (on the centenary of his birth)].
D013502:General Surgery / Q000266:history*; D049672:History, 19th Century; D049673:History, 20th Century; D012426:Russia; D012425:Russia (Pre-1917); D013557:Switzerland
Petr Aleksandrovich Gertsen (k stoletiiu so dnia rozhdeniia.