Columbia subject headings:
Boxers (Sports)--Ukraine--Biography.
Boxing--History.
Brothers--Ukraine--Biography.
Klitschko, Vitali, 1971-
Klitschko, Wladimir, 1976-
Harvard subject headings:
Boxers (Sports)--Ukraine--Biography.
Boxing--History
Brothers--Ukraine--Biography.
Klitschko, Vitali, 1971-
Klitschko, Wladimir, 1976-
Princeton subject headings: