N. Hadad, S., A. Nassery, O. and S.AL.Omari Sabah N. Hadad, F. 2005. Biostratigraphy of Planktonic Foraminifera Within Shiranish Formation(Late Campanian-Middle Maastrichtian)in Butmah Well No. 15 Northwest Iraq. Iraqi National Journal of Earth Science (INJES). 5, 1 (Jun. 2005), 32–43. DOI:https://doi.org/10.33899/earth.2005.36640.