Bibliography

http://www.harappa.com/script/index.html

http://www.mrdowling.com/images/612india_map.png

Rivervalleypeyton.weebly.com

http://www.mrdowling.com/images/612india_map.png

http://www.win1040.com/reporter/2013-03/wk-images/map.jpg

Notability notes

Venn diagram

http://questgarden.com/172/20/8/140610180635/images/ancientchina.jpg

http://i.ytimg.com/vi/n7ndRwqJYDM/mqdefault.jpg