Columbia subject headings:
Harvard subject headings:
Names, Geographical--Russia (Federation)--Caucasus, Northern--Congresses.
Onomastics--Russia (Federation)--Caucasus, Northern--Congresses.
Onomastics--Russia (Federation)--Congresses.
Princeton subject headings:
Names, Geographical--Russia (Federation)--Caucasus, Northern--Congresses.
Onomastics--Russia (Federation)--Caucasus, Northern--Congresses.