1. Appalachian Regional Commission, 1998. Economic impact of the Appalachian Development Highway System. Prepared by Wilber Smith Associates. 〈www.appalachianohio.com〉. Managed by Ohio University's Voinovich Center for Leadership and Public Affairs. 2005–2006.
2. Image segmentation for change detection in urban environments;Bähr,2001
3. The Appalachian Regional Commission: Twenty-Five Years of Government Policy;Bradshaw,1992
4. The Appalachian regional development program;Britt;Growth and Change,1971
5. Highway Investment and Rural Economic Development;Brown;Economic, Research Service/United States Department of Agriculture,1999