Columbia subject headings:
Astronautics--Soviet Union--History.
Astronauts--Soviet Union.
Manned space flight--History.
Harvard subject headings:
Manned space flight--History
Manned space flight--Russia (Federation)--History.
Manned space flight--Soviet Union--History.
Princeton subject headings:
Manned space flight--Russia (Federation)--History.
Manned space flight--Soviet Union--History.