F. A., L., Esther O., E., Hope E., O. and Aduomahor, B.O. 2016. Chemostratigraphy: Major/Minor Elemental Ratio Trends in Goml-1 Well Benin Flank in the Northern Delta Depobelt Nigeria (A Case Study of Na:Zn And K:Mn.). International Journal of Sciences: Basic and Applied Research (IJSBAR). 28, 3 (Jul. 2016), 204–216.