Alobaidy, A. R., and A. S. Al-Banna. “Density - Velocity Relationship and Prediction of Lithology Variation Using Physical Analysis in Kf-4 Well of The Kifl Oil Field, Yamama Formation, South of Iraq”. Iraqi Journal of Science, Vol. 62, no. 10, Oct. 2021, pp. 3601-1, doi:10.24996/ijs.2021.62.10.18.