Nahadi, J.J. and Atadashi, M.I. 2018. THE EFFECTS OF VARIATION OF CATALYST CONCENTRATION ON BIODIESEL PRODUCTION. International Journal of Research -GRANTHAALAYAH. 6, 9 (Sep. 2018), 487–496. DOI:https://doi.org/10.29121/granthaalayah.v6.i9.2018.1272.