[Map of United States indicating trade winds and major rail lines]

Citation

[Map of United States indicating trade winds and major rail lines], Map, n.d.; digital image, (http://texashistory.unt.edu/ark:/67531/metapth15127/ : accessed August 21, 2014), University of North Texas Libraries, The Portal to Texas History, http://texashistory.unt.edu; crediting The University of Texas-Pan American, Edinburg, Texas.

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