4. Sources

1. http://www.nhai.org/roadnetwork.htm

2. Annual Report 2010–11" (PDF). Ministry of Road Transport and Highways, Government of India. p. 1. Retrieved 3 April 2013.

3. http://www.nhai.org/WHATITIS.asp

4. https://sites.google.com/site/roadnumberingsystems/home/route-lists/asian-highways

5. http://en.wikipedia.org/wiki/Asian_Highway_Network

6. http://iwai.nic.in/index1.php?lang=1&level=2&sublinkid=145&lid=164

7. https://www.un.org/en/development/desa/policy/wesp/wesp_archive/2012chap2.pdf

8. http://www.wto.org/english/res_e/statis_e/its2013_e/its13_toc_e.htm

9. http://comtrade.un.org/db/mr/daYearsGraph.aspx

10. http://en.wikipedia.org/wiki/Association_of_Southeast_Asian_Nations

11. http://en.wikipedia.org/wiki/FM_broadcasting_in_India

12. Economic Survey 2013

13. NCERT – India People and Economy

14. ICSE Geography- Class X - -R K Jain

15. Geography Class XII – Yashpal Singh

16. India- A Comprehensive Geography – D.R. Khullar

17. NCERT – Fundamentals of Human Geography

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