1. United States Census Bureau. American Fact Finder. Annual Estimates of the Resident Population: April 2010 to July 1 2013. 2014.
http://factfinder2.census.gov/faces/nav/jsf/pages/index.xhtml
. Accessed 10 Oct 2014.
2. Bhavsar GP, Martin AB, Probst JC, Torres ME, Iyer M, Hardin J. Rural border health chartbook II. Columbia: South Carolina Rural Health Research Center, Rural Health Research & Policy Centers; 2014.
3. Soden DL. At the cross roads: U.S./Mexico border counties in transition. U.S./Mexico border County Coalition. 2006.
4. Gerber J. Developing the U.S.–Mexico border region for a prosperous and secure relationship: human and physical infrastructure along the U.S. border with Mexico. 2009.
5. Pan American Health Organization. United States–Mexico border area. Health in the Americas Volume II-Countries. 2007.
http://www.paho.org/hia/archivosvol2/paisesing/United%20States%20Mexico%20Border%20Area%20English.pdf
. Accessed 10 Oct 2014.