?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.au=Visser%2C+Fieke+H.+L.&rft.aulast=Visser&rft.aufirst=Fieke+H.+L.&rft.degree=Master&rft.title=Societal+economic+performance+of+primary+civilizations%3A+A+quantitative%2C+comparative+analysis+of+Mesopotamia%2C+the+Aztec+empire%2C+ancient+Egypt+and+ancient+China&rft.date=2016