Ellenberg, G. B. (2007). Mule South to tractor South: Mules, machines, and the transformation of the cotton South. University of Alabama Press.
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Chicago-čujuhus (17. p.)
Ellenberg, George B. Mule South to Tractor South: Mules, Machines, and the Transformation of the Cotton South. Tuscaloosa: University of Alabama Press, 2007.
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MLA-čujuhus (9. p.)
Ellenberg, George B. Mule South to Tractor South: Mules, Machines, and the Transformation of the Cotton South. University of Alabama Press, 2007.
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