Title: Taghayyur majrá Nahr Dijlah bayna Balad wa-Baghdād, khilāl al-ʻaṣr al-ʻAbbāsī bi-istiʻmāl muʻṭayāt al-istishʻār ʻan buʻd
Subjects: Water diversion
Places: Iraq, Tigris River Watershed, Tigris River