# References

Goodman, M. (1997) The Roman World, 44 BC–AD 180, London and New York, Routledge, Routledge History of the Ancient World.

Nicolet, C. (1991) Geography, Space and Politics in the Early Roman Empire, Ann Arbor, University of Michigan Press.

Grant, M. (trans.) (1996) Tacitus: the Annals of Imperial Rome, Harmondsworth, Penguin Books. (First published 1956. Revised edition 1971. Revised with new bibliography 1989. Reprinted with revised bibliography 1996.)

Wells, C. (1992) The Roman Empire (2nd edn; first published 1984), London, Fontana Press, Fontana History of the Ancient World.

Whittaker, C.R. (1994) Frontiers of the Roman Empire: a Social and Economic Study, Baltimore and London, Johns Hopkins University Press.

OpenLearn - The Roman Empire: introducing some key terms
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