Transesterification of Castor Oil for Biodiesel Production Using H2SO4 Wet Impregnated Snail, Egg and Crab Shell Catalyst. IJLTEMAS [Internet]. 2024 Jun. 21 [cited 2026 Mar. 13];13(5):195-208. Available from: https://www.ijltemas.in/submission/online/article/view/672