Columbia subject headings:
Cooling--Congresses.
Galaxies--Clusters--Congresses.
Galaxies--Congresses.
Gas dynamics--Congresses.
Radio astrophysics--Congresses.
Harvard subject headings:
Cooling--Congresses.
Galaxies--Clusters--Congresses
Galaxies--Congresses
Gas dynamics--Congresses.
Radio astrophysics--Congresses.
Princeton subject headings:
Cooling--Congresses.
Galaxies--Clusters--Congresses.
Galaxies--Congresses.
Gas dynamics--Congresses.
Radio astrophysics--Congresses.