Columbia subject headings:
Harvard subject headings:
Asia, Central--Civilization--Congresses.
Science--Asia, Central--History--Congresses.
Science--Asia, Central--History.
Ulugh Beg, 1394-1449--Congresses.
Princeton subject headings:
Asia, Central--Civilization--Congresses.
Science--Asia, Central--History.
Ulugh Beg, 1394-1449--Congresses.