Charlotte-Mecklenberg Public Schools (n. d.). Retrieved July 19, 1999 from http://www.cms.k12.nc.us
Cooke, D. F. (1997). Topology and TIGER: The Census Bureau's Contribution. In T. W. Foresman (Ed.), The history of geographic information systems: Perspectives from the pioneers. (pp. 47 - 57). Upper Saddle River, NJ: Prentice Hall.
Discreet Research (n.d.). Retrieved July 19, 1999 from http://www.dresearch.com
Etak Corporation (n.d.). EtakGuide. Retrieved July 19, 1999 from http://www.etakguide.com
Federal Geographic Data Committee (April 2006). Retrieved July 19, 1999 from http://www.fgdc.gov
Framingham Public Schools (1998). Racial balance policy: Assignment of students to schools. Retrieved July 19, 1999 from www.framingham.k12.ma.us/update/0198rbp.html (since retired).
Francica, J. (n.d.). Geodezix Consulting. Retrieved July 19, 1999 from www.geodezix.com (since retired).
MapQuest (n. d.). Retrieved July 19, 1999 from http://www.mapquest.com
Marx, R. M. (Ed.). (1990). The Census Bureau's TIGER system. [Special issue]. Cartography and Geographic Information Systems 17:1.
MSN (2005). Maps and directions. Retrieved May 3, 2006 from http://www.mapblast.com
Navigation Technologies Inc. (2006). Welcome to NavTech. Retrieved July 19, 1999 from http://www.navtech.com
RTK NET (n. d.). LandView III -- RTK NET distribution. Retrieved July 19, 1999 from http://www.RTK.NET/landview/ (since retired).
TeleAtlas (2006). Welcome to TeleAtlas. Retrieved May 3, 2006 from http://www.teleatlas.com/Pub/Home
U.S. Census Bureau (1997). TIGER/Line Files (1997 Technical Documentation). Retrieved January 2, 1999 from http://www.census.gov/geo/tiger/TIGER97C.pdf
U.S. Census Bureau (2002). LandView III specialized computer mapping application. Retrieved July 19, 1999 from http://www.census.gov/geo/www/tiger/landview.html
U.S. Census Bureau (2003). TIGER/Line Files, 2003 (metadata). Retrieved February 3, 2008 from http://www.census.gov/geo/www/tlmetadata/tl2003meta.txt
U.S. Census Bureau (n. d.). 21st Century MAF/TIGER Enhancements. Retrieved February 3, 2008 from http://www.census.gov/geo/mod/overview.pdf
U.S. Census Bureau (2005). Geography division map gallery. Retrieved July 19, 1999 from http://www.census.gov/geo/www/mapGallery/