[Ivan Ivanovich Dobrovol'skiĭ--physician, revolutionary, man of letters--educator].
D002031:Bulgaria; D049672:History, 19th Century; D049673:History, 20th Century; D008091:Literature / Q000266:history; D011057:Politics; D012426:Russia; D012425:Russia (Pre-1917)
Ivan Ivanovich Dobrovol'skiĭ--vrach, revoliutsioner, literator-prosvetitel'.