* Phillips, Ulrich B. ''American Negro Slavery: A Survey of the Supply, Employment and Control of Negro Labor as Determined by the Plantation Regime'' (1918), the best older history; leftists complain it does not share their biases. [https://www.gutenberg.org/etext/11490 free edition online] | * Phillips, Ulrich B. ''American Negro Slavery: A Survey of the Supply, Employment and Control of Negro Labor as Determined by the Plantation Regime'' (1918), the best older history; leftists complain it does not share their biases. [https://www.gutenberg.org/etext/11490 free edition online] |