Columbia subject headings:
Asia, Central--History.
Iraq--History--634-1534.
Harvard subject headings:
Art--Asia, Central--Congresses.
Asia, Central--Civilization--Congresses.
Asia, Central--Relations--Iran--Congresses.
Indo-Iranian philology--Congresses.
Iran--Antiquities--Congresses.
Iran--Relations--Asia, Central--Congresses.
Manichaeism--Congresses.
Princeton subject headings:
Asia, Central--Antiquities--Congresses.
Asia, Central--Civilization--Congresses.
Iran--Antiquities--Congresses.
Iran--Civilation--Congresses.