Farhan, Duaa A., Farkad A. Lattieff, and Mohammed A. Atiya. 2018. “Co-Digestion of Shumblan With Different Wastes As a Source for the Biogas Production”. Al-Khwarizmi Engineering Journal 14 (4): 83-91. https://doi.org/10.22153/kej.2018.04.004.