Columbia subject headings:
Cosmogony--Congresses.
Dark matter (Astronomy)--Congresses.
Harvard subject headings:
Astrophysics--Congresses
Cosmic background radiation--Congresses.
Cosmogony--Congresses.
Dark matter (Astronomy)--Congresses
Galaxies--Evolution--Congresses
Superclusters--Congresses.
Princeton subject headings:
Cosmogony--Congresses.
Dark matter (Astronomy)--Congresses.