Title: Peterburgskai︠a︡ Akademii︠a︡ Nauk i Ėstonii︠a︡
Subjects: Imperatorskai︠a︡ akademii︠a︡ nauk (Russia), History, Tartu Riiklik Ülikool, Intellectual cooperation, Imperatorskai͡a akademīi͡a nauk (Russia), Relations, Akademii︠a︡ nauk SSSR