Columbia subject headings:
Astronautics and state--Soviet Union.
Astronautics and state--United States.
Astronautics--Soviet Union--History.
Astronautics--United States--History.
Harvard subject headings:
Astronautics and state--Soviet Union.
Astronautics and state--United States.
Astronautics--Soviet Union--History
Astronautics--United States--History
Princeton subject headings:
Astronautics and state--Soviet Union.
Astronautics and state--United States.
Astronautics--Soviet Union--History.
Astronautics--United States--History.