Brock,, William R.
Conflict and transformation : the United States 1844-1877 / William R. Brock
Conflict and transformation : the United States 1844-1877 / William R. Brock
. - [Harmondsworth] : Penguin Books, colof. 1976
. - 488 p. 19 cm
. - (The pelican history of the United States; 3)
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