| Helprin, Some Twentieth-Century Historians 1961 pp 143-70• 1951 and , Struggle for Mastery in Europe 1848-1918 Oxford UP, 1954• Kershaw, Ian The Nazi Dictatorship, London, Arnold, 2000, pp | |
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| Covered in depth in , The diplomacy of imperialism: 1890-1902 2nd ed | , The Encyclopedia of Historians and Historical Writing 1999 p |
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