Columbia subject headings:
Iranian languages--Dialects--Congresses.
Iranian languages--Grammar--Congresses.
Slavic languages--Dialects--Congresses.
Slavic languages--Grammar--Congresses.
Tajik language--Dialects--Congresses.
Tajik language--Grammar--Congresses.
Turkic languages--Dialects--Congresses.
Turkic languages--Grammar--Congresses.
Harvard subject headings:
Iranian languages--Dialects--Congresses.
Iranian languages--Grammar--Congresses.
Slavic languages--Dialects--Congresses.
Slavic languages--Grammar--Congresses.
Tajik language--Dialects--Congresses.
Tajik language--Grammar--Congresses.
Turkic languages--Dialects--Congresses.
Turkic languages--Grammar--Congresses.
Princeton subject headings: