Abusaloua, Ali, et al. “STUDY OF WASTEWATER TREATMENT UNIT IN ALBREGA COMPANY AZAWIA, LIBYA”. المؤتمر العلمي الثاني لعلوم البيئة، 2015م, Dec. 2015, pp. 687-98, https://conf.asmarya.edu.ly/index.php/ces2/article/view/697.