Columbia subject headings:
Harvard subject headings:
Indo-European languages--Asia, Central--History.
Indo-European languages--China--History.
Indo-Europeans--Asia, Central--History.
Indo-Europeans--China--History.
Princeton subject headings:
Indo-European languages--Asia, Central--History.
Indo-European languages--China--History.
Indo-Europeans--Asia, Central--History.
Indo-Europeans--China--History.