Saloom AM, Fayad AA ., Ali ET . Novel Schiff Bases Derived From Pyromellitic Dianhydride. IHJPAS [Internet]. 2017 Apr. 13 [cited 2024 Nov. 25];27(3):479-92. Available from: https://jih.uobaghdad.edu.iq/index.php/j/article/view/313