Columbia subject headings:
Astrometry--Congresses.
Large astronomical telescopes--Congresses.
Harvard subject headings:
Astrometry--Congresses
Astrometry--Data processing--Congresses.
Large astronomical telescopes--Congresses.
Radio astronomy--Congresses
Space astronomy--Instruments--Congresses.
Princeton subject headings:
Astrometry--Congresses.
Large astronomical telescopes--Congresses.