Columbia subject headings:
Russian language--Dialects--Russia (Federation)--Kama River Region--Lexicology.
Harvard subject headings:
Russian language--Dialects--Russia (Federation)--Kama River Region--Lexicology.
Russian language--Dialects--Russia (Federation)--Kama River Region.
Princeton subject headings:
Russian language--Dialects--Russia (Federation)--Kama River Region.