Mahdi1, A., 		Al-Beyati2, F., 		Al Tarif, A., 		H. Shendi4, E., & 		.Abdel-fattah4, M.
2019 Nov  3.  Palynofacies and Paleoenvironment investigation of the Hauterivian – Early Aptian Ratawi and Zubair formations, Balad oilfield, Central Iraq. Tikrit Journal of Pure Science. [Online] 24:6