Bibliography

Four Class System

1.) http:// www.travelchinaguide.com/history/yuan/fourclass-system 

Möngkwke   

2.) http://en.wikipedia.org/wiki/m%c3%b6ngkwke

The Yuan Dynasty    

www.chinahighlights.com/travelguide/culture/the-yuan-dynasty.htm

 Kublai Khan

4.)http://search.chinaculture.org/search.jsp

 Invention of Gunpowder

5.)  http://asianhistory.about.com/od/asianinventions/a/InventGunpowder.htm

 Four Great Painters of the Yuan Dynasty

6.) http://www.chinaculture.org/library/2008-01/14/content_39594.htm

History of China

7.) Picture of Map: http://www.history-of-china.com/yuan-dynasty/politics-of-yuan.html