Columbia subject headings:
Atomic theory.
Heavy ions.
Quantum electrodynamics.
Harvard subject headings:
Atomic theory--Congresses.
Collisions (Nuclear physics)--Congresses.
Heavy ions--Congresses.
Ions--Spectra--Congresses.
Quantum electrodynamics--Congresses.
Princeton subject headings:
Atomic theory--Congresses.
Collisions (Nuclear physics)--Congresses.
Ions--Spectra--Congresses.
Quantum electrodynamics--Congresses.