Columbia subject headings:
Rome--History--Empire, 284-476--Sources.
Harvard subject headings:
Rome--History--Period of military anarchy, 235-284--Historiography.
Rome--History--Period of military anarchy, 235-284--Sources.
Rome--History--Severans, 193-235--Historiography.
Rome--History--Severans, 193-235--Sources.
Rome--Politics and government--30 B.C.-284 A.D.--Historiography.
Rome--Politics and government--30 B.C.-284 A.D.--Sources.
Princeton subject headings:
Rome--History--Period of military anarchy, 235-284--Historiography.
Rome--History--Period of military anarchy, 235-284--Sources.
Rome--History--Severans, 193-235--Historiography.
Rome--History--Severans, 193-235--Sources.
Rome--Politics and government--30 B.C.-284 A.D.--Historiography.
Rome--Politics and government--30 B.C.-284 A.D.--Sources.