Columbia subject headings:
Few-body problem--Congresses.
Harvard subject headings:
Electromagnetic interactions--Congresses.
Few-body problem--Congresses
Hadron interactions--Congresses.
Quarks--Congresses
Princeton subject headings:
Electromagnetic interactions--Congresses.
Few-body problem--Congresses.
Hadron interactions--Congresses.
Quarks--Congresses.