[Nikolaĭ Nikolaevich Petrov--scientist, physician-humanist].
D013502:General Surgery / Q000266:history; D049672:History, 19th Century; D049673:History, 20th Century; D008887:Military Medicine / Q000266:history; D010817:Physician-Patient Relations; D012426:Russia; D012425:Russia (Pre-1917); D012577:Schools, Medical / Q000266:history
Nikolaĭ Nikolaevich Petrov--uchenyĭ, vrach-gumanist