The Scientists visits to Baghdad in the Period 447-647HD / 1055-1245AD Through the book The Supplement of History of Baghdad By Ibn Al Najjar: (Study The Causes). Al-adab J. [Internet]. 2023 Dec. 15 [cited 2024 May 10];1(147):219-42. Available from: https://aladabj.uobaghdad.edu.iq/index.php/aladabjournal/article/view/4139