Columbia subject headings:
Cosmology--Congresses.
Particles (Nuclear physics)--Congresses.
String models--Congresses.
Harvard subject headings:
Cosmology--Congresses.
Particles (Nuclear physics)--Congresses
String models--Congresses.
Princeton subject headings:
Cosmology--Congresses.
Particles (Nuclear physics)--Congresses.
String models--Congresses.