http://www.wjcc.k12.va.us/djm/Ancient_Civilizations/china/contributions.htm

 

http://www.vhinkle.com/china/inventions.html

 

http://listverse.com/2009/04/18/10-great-ancient-chinese-inventions

 

http://www.sdcoe.net/score/chinin/chininsg5.htm

 

http://library.thinkquest.org/23062/match.html