중국 지도 모음 - 하(夏)나라

http://home.olemiss.edu/~gg/hstrymap/lishidit.htm

http://en.wikipedia.org/wiki/Xia_Dynasty

http://www.nmh.gov.tw/zh-tw/History/List.aspx?Para=2%7C&unkey=32

http://zh.wikipedia.org/wiki/%E5%A4%8F%E6%9C%9D

http://baike.baidu.com/view/23706.htm

http://www.sxhoo.com/history/

http://image.baidu.com/i?ct=503316480&z=0&tn=baiduimagedetail&word=%CF%C4%B3%AF&in=24752&cl=2&cm=1&sc=0&lm=-1&pn=5&rn=1&di=466265969&ln=491&fr=