OF THE COTTON TRADE
1861 - 1865
Developed from the NATIONAL GEOGRAPHICAL
SOCIETY'S March 1952, map of NORTH AMERICA.
Chamberlin Trlmetric Projection
Texas State Historical Association. The Southwestern Historical Quarterly, Volume 77, July 1973 - April, 1974. Austin, Texas. The Portal to Texas History. http://texashistory.unt.edu/ark:/67531/metapth117148/. Accessed July 31, 2014.