Columbia subject headings:
Harvard subject headings:
Baudouin de Courtenay, Jan Niecisław, 1845-1929.
Linguistics--History--19th century
Linguistics--History--20th century
Linguistics--Philosophy
Princeton subject headings:
Baudouin de Courtenay, Jan Niecisław, 1845-1929.
Linguistics--History--19th century.
Linguistics--History--20th century.
Linguistics--Philosophy.