salih alzbaidy, saad, سعد, Ammar Al-Khazraji, and عمار. 2020. “The Use of Lignin in the Rheological Modification of Dura Asphalt”. Journal of Education and Science (JES) 29 (4):22-41. https://doi.org/10.33899/edusj.2020.126782.1055.