Columbia subject headings:
Linguistic geography.
Maps.
Slavic languages, Eastern--Dialects--Maps.
Slavic languages, Eastern--Dialects--Poland--Białystok (Voivodeship)
Harvard subject headings:
Slavic languages, Eastern--Dialects--Poland--Białystok (Voivodeship)--Glossaries, vocabularies, etc.
Slavic languages, Eastern--Dialects--Poland--Białystok (Voivodeship)--Maps.
Princeton subject headings:
Linguistic geography.
Slavic languages, Eastern--Dialects--Maps.
Slavic languages, Eastern--Dialects--Poland--Białyst (Voivodeship).