A. Ahmed, M. et al. 2023. Asphaltene Precipitation Investigation Using a Screening Techniques for Crude Oil Sample from the Nahr-Umr Formation/Halfaya Oil Field. Iraqi Journal of Chemical and Petroleum Engineering. 24, 1 (Mar. 2023), 41–50. DOI:https://doi.org/10.31699/IJCPE.2023.1.6.