Columbia subject headings:
Harvard subject headings:
Indo-European antiquities.
Indo-European languages--History.
Indo-Europeans--Economic conditions.
Indo-Europeans--Social life and customs.
Indo-Europeans.
Proto-Indo-European language--History.
Princeton subject headings:
Indo-European antiquities.
Indo-European languages--History.
Indo-Europeans--Economic conditions.
Indo-Europeans--Social life and customs.
Indo-Europeans.
Proto-Indo-European language--History.