Columbia subject headings:
Geta Lucius Septimius, Emperor of Rome, 189-212.
Rome--History--Lucius Septimius Severus, 193-211.
Harvard subject headings:
Geta Lucius Septimius, Emperor of Rome, 189-212.
Rome--History--Lucius Septimius Severus, 193-211.
Princeton subject headings:
Geta Lucius Septimius, Emperor of Rome, 189-212.
Rome--History--Lucius Septimius Severus, 193-211.