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Roberts, J. M. (2000). The Penguin history of teh twentieth century: The history of the World, 1901 to the present (1st Ed.). London: Penguin Books.

Roberts, J M. The Penguin History of Teh Twentieth Century: The History of the World, 1901 to the Present. 1st Ed. London: Penguin Books, 2000.

Roberts, J M. The Penguin History of Teh Twentieth Century: The History of the World, 1901 to the Present. 1st Ed. London: Penguin Books, 2000.