Hassan, Ismail, Musa Abdullahi, and Lawal Garba. “Biogas Production from Cow Dung Using Laboratory Scale Digester As Potential Tool for Abattoir Waste Management”. Gadau Journal of Pure and Allied Sciences 1, no. 1 (June 30, 2022): 40–47. Accessed September 19, 2024. https://gadaufos.com/gjpas/index.php/journal/article/view/13.