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  • Swartz, B.K."The origin of American Christmas myth and custom." http://www.bsu.edu/web/01bkswartz/xmaspub.html
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  • "Caribou & reindeer." http://www.mnh.si.edu/arctic/html/caribou_reindeer.html
  • "How does NORAD track Santa?" http://www.noradsanta.org/en/how_we_do_it.php
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  • "The Claus that refreshes." March 2007. http://www.snopes.com/cokelore/santa.asp