"Top 10 Cities of the Year 1000". About.com Geography. About.com. Archived from the original on June 5, 2013.
It references Chandler, Tertius (1987). Four Thousand Years of Urban Growth: An Historical Census. St. David's University Press.
"Top 10 Cities of the Year 1000". About.com Geography. About.com. Archived from the original on June 5, 2013.
It references Chandler, Tertius (1987). Four Thousand Years of Urban Growth: An Historical Census. St. David's University Press.