Title: Trudy XXX-XXXI Chteniĭ, posvi︠a︡shchennykh razrabotke nauchnogo nasledii︠a︡ i razvitii︠u︡ ideĭ K.Ė. T︠S︡iolkovskogo
Subjects: Congresses, Astronautics
People: K. T︠S︡iolkovskiĭ (1857-1935)