Title: Mezhdunarodnai︠a︡ konferent︠s︡ii︠a︡ posvi︠a︡shchennai︠a︡ 100-letii︠u︡ so dni︠a︡ rozhdenii︠a︡ professora V.I. Ravdonikasa
Subjects: Congresses
People: V. I. Ravdonikas (1894-1976)