Al-Wazan, A.M. 2026. Alaa M. Al-Wazan Calcareous Nannofossils Biostratigraphy of Chia Gara Formation in Banik village, Northern Iraq . Al-Kitab Journal for Pure Sciences. 10, 02 (Oct. 2026), 299–314. DOI:https://doi.org/10.32441/kjps.10.02.p21.