Columbia subject headings:
Harvard subject headings:
Cosmology--Congresses.
Galaxies--Congresses
Interstellar matter--Congresses.
Quasars--Congresses
Red shift--Congresses.
Weymann, R. J. (Ray J.)
Princeton subject headings:
Cosmology--Congresses.
Quasars--Congresses.
Red shift--Congresses.
Weymann, R. J. (Ray J.)