
下出ている情報の出処は次のようだ :
http://www.chinahistoryforum.com/topic/34145-the-pre-industrial-economies-of-western-europe-and-china/
http://en.wikiversity.org/wiki/Comparison_between_Roman_and_Han_Empires
http://en.wikipedia.org/wiki/Roman_metallurgy
http://en.wikipedia.org/wiki/Han_dynasty
http://en.wikipedia.org/wiki/Classical_demography
中国文明ダッシュなの第 2冊, p.228
ペーパーロード, p.225‾226
The Ancient Economy, p 194
The Size of the Economy and theDistribution of Income in the Roman Empire, The Journal of Roman Studies, Vol. 99, p. 61