Title: Trudy V obʺedinennykh nauchnykh chteniĭ po kosmonavtike, posvi͡ashchennykh pami͡ati vydai͡ushchikhsi͡a sovetskhikh uchenykh--pionerov osvoenii͡a kosmicheskogo prostranstva
Subjects: Astronautics, Celestial mechanics, Congresses, Navigation (Astronautics)