RT Article T1 Fortifications and mangonel operation in thirteenth-century Ayyubid cities: Damietta as a case study JF Crusades VO 19 SP 115 OP 125 A1 Khamisy, Rabei G. LA English PB Routledge, Taylor & Francis Group YR 2020 UL https://ixtheo.de/Record/1753932696