Columbia subject headings:
Harvard subject headings:
Astronomy--Asia--Observations--Congresses.
Astronomy--Observations--Congresses.
Astrophysics--Asia--Observations--Congresses.
Astrophysics--Observations--Congresses.
Princeton subject headings:
Astronomy--Observations--Congresses.
Astronomy--Research--Asia--Congresses.
Astrophysics--Observations--Congresses.