Columbia subject headings:
Emperors--Rome--Biography.
Rome--History--Empire, 30 B.C.-284 A.D.
Harvard subject headings:
Emperors--Rome--Biography
Rome--History--Empire, 30 B.C.-284 A.D.
Princeton subject headings:
Emperors--Rome--Biography.
Rome--History--Flavians, 69-96.
Rome--History--Julio-Claudians, 30 B.C.-68 A.D.