Columbia subject headings:
Harvard subject headings:
Historical linguistics--Congresses.
Indo-European antiquities--Congresses.
Indo-European languages--History--Congresses.
Law, Indo-European--Congresses.
Mythology, Indo-European--Congresses.
Princeton subject headings:
Historical linguistics--Congresses.
Indo-European antiquities--Congresses.
Indo-European languages--History--Congresses.
Law, Indo-European--Congresses.
Mythology, Indo-European--Congresses.