Adnan Q. Mahdi, Fawzi M. Al-Beyati, A. M. Al Tarif, El-Arabi H. Shendi and Mohamed I.Abdel-fattah (2019) “Palynofacies and Paleoenvironment investigation of the Hauterivian – Early Aptian Ratawi and Zubair formations, Balad oilfield, Central Iraq”, Tikrit Journal of Pure Science, 24(6), pp. 74–80. doi: 10.25130/tjps.v24i6.440.