Columbia subject headings:
Active galaxies--Congresses.
Galactic nuclei--Congresses.
Radio sources (Astronomy)--Congresses.
Harvard subject headings:
Active galaxies--Congresses.
Galactic nuclei--Congresses.
Radio sources (Astronomy)--Congresses.
Very long baseline interferometry--Congresses.
Princeton subject headings:
Active galaxies--Congresses.
Plasma (Ionized gases)--Congresses.
Plasma jets--Congresses.
Radio sources (Astronomy)--Congresses.