Columbia subject headings:
Klein, Abraham, 1927---Congresses.
Mathematical physics--Congresses.
Nuclear physics--Congresses.
Particles (Nuclear physics)--Congresses.
Quantum chromodynamics--Congresses.
Quantum electrodynamics--Congresses.
Quantum field theory--Congresses.
Quantum theory--Congresses.
Harvard subject headings:
Klein, Abraham, 1927---Congresses.
Physicists--United States--Biography--Congresses.
Physics--Congresses
Princeton subject headings:
Klein, Abraham, 1927---Congresses.
Physicists--United States--Biography--Congresses.
Physics--Congresses.