J. Robert Osborne
1.
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McPherson, James,
The Battle Cry of Freedom
, Oxford University Press, Oxford and New York, 1988 (Page 284)
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2.
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Simon, James F.,
Lincoln and Chief Justice Taney
, Simon and Shuster Paperbacks, New York, London and Toronto, 2006 (Page 189)
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3.
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Farber, Daniel,
Lincoln’s Constitution
, The University of Chicago Press, Chicago and London, 2003 (Page 169)
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