Manual on Foreign Direct Investment:

http://dipp.nic.in/manual/manual_03_05.pdf

Guidelines for Foreign/technical collaborations with previous ventures/tie-ups in India:

http://siadipp.nic.in/policy/changes/pn1_2005.pdf

India in Business:

http://indiainbusiness.nic.in/

Department of Economic Affairs, Ministry of Finance

http://finmin.nic.in/the_ministry/dept_eco_affairs/fipb/fipb_index.htm