Columbia subject headings:
Astronautics and state--United States.
Outer space--Exploration--United States.
Space flight--Government policy.
Space sciences--United States.
Harvard subject headings:
Astronautics and state--United States.
Outer space--Exploration--United States.
Space flight--Government policy--United States.
Space sciences--United Sates.
Princeton subject headings:
Astronautics and state--United States--History--Congresses.
Astronautics--United States--History--Congresses.
Outer space--Exploration--United States--History--Congresses.