Columbia subject headings:
Poland--History--Casimir IV, 1447-1492--Fiction.
Harvard subject headings:
Middle Ages--Juvenile fiction.
Poland--Fiction
Poland--History--Casimir IV, 1447-1492--Fiction.
Poland--History--Casimir IV, 1447-1492--Juvenile fiction.
Princeton subject headings:
Poland--History--Casimir IV, 1447-1492.