Columbia subject headings:
Galba, Servius Sulpicius, Emperor of Rome, 3 B.C.-69 A.D.
Otho, Marcus Salvius, Emperor of Rome, 32-69.
Rome--History--Civil War, 68-69.
Vespasian, Emperor of Rome, 9-79.
Vitellius, Aulus, Emperor of Rome, 15-69.
Harvard subject headings:
Galba, Servius Sulpicius, Emperor of Rome, 3 B.C.-69 A.D.
Nero, Emperor of Rome, 37-68.
Otho, Marcus Salvius, Emperor of Rome, 32-69.
Rome--History, Military--30 B.C.-476 A.D.
Rome--History--Flavians, 69-96
Rome--Politics and government--30 B.C.-284 A.D.
Vespasian, Emperor of Rome, 9-79.
Vitellius, Aulus, Emperor of Rome, 15-69.
Princeton subject headings:
Rome--History--Flavians, 69-96.
Rome--Politics and government--30 B.C.-284 A.D.