Columbia subject headings:
Harvard subject headings:
Idris I, King of Libya, 1890-
Idris I, King of Libya, 1890-1983.
Libya--History--1912-1951
Libya--Kings and rulers--Biography.
Princeton subject headings:
Idris I, King of Libya, 1890-1983.
Libya--History--1912-1951.
Libya--History--1951-1969.
Libya--Kings and rulers--Biography.