Columbia subject headings:
Philip, the Arabian, Emperor of Rome, approximately 204-249.
Rome--History--Empire, 30 B.C.-284 A.D.
Harvard subject headings:
Philip, the Arabian, Emperor of Rome, 244-249.
Rome--History--Empire, 30 B.C.-284 A.D.
Princeton subject headings:
Philip, the Arabian, Emperor of Rome, approximately 204-249.
Rome--History--Empire, 30 B.C.-284 A.D.