Intelligence Division of British War Office (Ministry of Defence, Great Britain); Center for Ancient Middle Eastern Landscapes, Institute for the Study of Ancient Cultures, University of Chicago
British War Office (2016). Survey of Egypt: 87-705_El_Mahsama. British War Office. https://isac-idb.uchicago.edu/id/9cb453bc-7864-4439-87fa-7ff005dc0510 (map)