Columbia subject headings:
Cosmic physics--Research--United States--Congresses.
Outer space--Exploration--United States--Congresses.
Space sciences--Research--United States--Congresses.
Harvard subject headings:
Cosmic physics--Research--United States--Congresses.
Outer space--Exploration--United States--Congresses.
Space sciences--Research--United States--Congresses.
Princeton subject headings: