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Hussein ST, Ali ET, Ali KF, Tomma JH. Evidence Supports The Formation Of Isoimides Derived From Pyromellitic Dianhydride. IHJPAS [Internet]. 2017 Apr. 30 [cited 2024 Nov. 22];26(1):241-9. Available from: https://jih.uobaghdad.edu.iq/index.php/j/article/view/530