Population of Medieval Baghdad

[Intrepid Adventurer]

Dear fellow history lovers!

For my MA thesis about the population of imperial Rome I'm looking to do a good comparative study. Abbasid Baghdad seems like a comparable city in terms of size and importance. I'm having some trouble finding good sources for this topic, however. Would any of you know of any good books or (preferably) articles that handle this topic?

Or perhaps you know of another city that would be worth comparing to Rome? I'm thinking about comparing the ways we arrive at population estimates, so the and availability and handling of sources must be present in the secondairy literature.

Thank you all a lot!