Columbia subject headings:
Baudouin de Courtenay, Jan Niecisław, 1845-1929.
Philologists--Poland--Biography.
Harvard subject headings:
Baudouin de Courtenay, Jan Niecisław, 1845-1929.
Philologists--Poland--Biography.
Princeton subject headings:
Baudouin de Courtenay, Jan Niecisław, 1845-1929.
Philologists--Poland--Biography.