Cenozoic foraminifera and calcareous nannofossil biostratigraphy of the Niger Delta - Adegoke, Oluwafeyisola Sylvester; Oyebamiji, Ajibola; Edet, James John; Osterloff, Peter; Ulu, Ogbonnaya Kalu; Edet, James John; Osterloff, Peter; Oyebamiji, Ajibola; Ulu, Ogbonnaya Kalu (Elsevier, 2017)