SourcesNHCK

- http://ancienthistory.abc-clio.com/Search/Display/602497?terms=song%20dynasty&webSiteCode=SLN_HANC&returnToPage=%2fSearch%2fDisplay%2f602497%3fterms%3dsong+dynasty&token=498C5CF26951A3FBFE90FA2AC21743C9&casError=False - http://www.travelchinaguide.com/intro/history/song/ - http://afe.easia.columbia.edu/song/ - http://www.hyperhistory.net/apwh/essays/cot/t3w10sungdynasty.htm - http://history.cultural-china.com/en/183History6030.html

Book: //- Traditions & Encounters// by Jerry H. Bentley and Herbert F. Ziegler