Columbia subject headings:
Astronautics--International cooperation.
Astronautics--Russia (Federation)
Astronautics--Soviet Union.
Astronautics--United States.
Harvard subject headings:
Astronautics--International cooperation
Outer space--Exploration--Russia (Federation)
Outer space--Exploration--United States.
Space sciences--Russia (Federation)
Space sciences--United States
Princeton subject headings:
Astronautics--International cooperation.
Astronautics--Russia (Federation).
Astronautics--Soviet Union.
Astronautics--United States.