Columbia subject headings:
Karachay-Balkar language--Lexicology, Historical.
Nogai language--Lexicology, Historical.
Harvard subject headings:
Karachay-Balkar language--Lexicology, Historical.
Nogai language--Lexicology, Historical.
Princeton subject headings:
Karachay-Balkar language--Lexicology, Historical.
Nogai language--Lexicology, Historical.