Columbia subject headings:
Archaeoastronomy--Congresses.
Astronomy, Ancient--Congresses.
Indian astronomy--Congresses.
Harvard subject headings:
Archaeoastronomy--Congresses.
Astronomy, Ancient--Congresses.
Indian astronomy--Congresses.
Princeton subject headings:
Archaeoastronomy--Congresses.
Astronomy, Ancient--Congresses.
Indian astronomy--Congresses.