Columbia subject headings:
Ammianus Marcellinus. Rerum gestarum libri. Liber 20.
Rome--History--Empire, 284-476.
Harvard subject headings:
Ammianus Marcellinus. Rerum gestarum libri. Liber 20.
Rome--History--Constantius II, 337-361.
Rome--History--Julian, 361-363
Princeton subject headings:
Ammianus Marcellinus. Rerum gestarum Libri. Liber 20.
Rome--History--Empire, 284-476.