Columbia subject headings:
India--Description and travel--Congresses.
India--Historical geography--Congresses.
India--Historiography--Congresses.
Megasthenes.
Harvard subject headings:
Megasthenes--Congresses.
Orient--Description and travel--Congresses.
Princeton subject headings:
India--Description and travel--Congresses.
India--Historical geography--Congresses.
India--Historiography--Congresses.
Megasthenes.