http://www.dl.ket.org/latinlit/mores/currency/currency.htm
http://www.brims.co.uk/romans/farming.html
http://en.wikipedia.org/wiki/List_of_Roman_emperors
http://romannumeralconversion.com/numerals1-1000.htm
http://www.brims.co.uk/romans/farming.html
http://en.wikipedia.org/wiki/List_of_Roman_emperors
http://romannumeralconversion.com/numerals1-1000.htm