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"[Arkansas] State Highways 2009 (Database)." April 2010. AHTD: Planning and Research Division. Database.Archived 2011-07-07 at the Wayback Machine Retrieved May 28, 2011.
"Pig Trail Scenic Byway Overview." America's Byways. United States Department of Transportation. OverviewArchived 2013-09-10 at the Wayback Machine Retrieved 2011-05-28.