Columbia subject headings:
Harvard subject headings:
Belarus in literature.
Belarusian language--Research--Poland--History--19th century.
Belarusian language.
Folklore in literature.
Folklore--Belarus--History and criticism.
Folklore--Research--Belarus--Poland--History--19th century.
Polish literature--19th century--History and criticism.
Princeton subject headings:
Philologists--Poland--Biography.