Columbia subject headings:
Belarusian language--Dialects.
Russian language--Dialects.
Ukrainian language--Dialects.
Harvard subject headings:
Belarusian language.--Dialects.
Russian language--Dialects.
Ukrainian language--Dialects.
Princeton subject headings:
Belarusian language--Dialects.
Russian language--Dialects.
Ukrainian language--Dialects.