| University of Western Australia Press | Turpin, Colin; Tomkins, Adam 2007 |
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| "The Imperial Crown of This Realm: Henry VIII, Constantine the Great, and Polydore Vergil" | New York: Facts on File |
Aspects of British political history, 1815—1914.
| States and power in Africa: comparative lessons in authority and control | Wars of imperial conquest in Africa, 1830—1914 |
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| 424 chapter 9 English Worldwide by : "approximately one in four of the worlds population are capable of communicating to a useful level in English" | British government and the constitution 6th ed |
"Expansion and Contraction Patterns of Large Polities: Context for Russia".
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