Prospect of African Bush Mango, kapok, Sesame, and Avocado Seeds Oils as a Feedstock for Biodiesel Production over CaSO4/Al2O3 Catalyst Journal title: IOSR Journal of Applied Chemistry (IOSR-JAC) Authors: M. A. Sokoto, Y. M. Sahabi, M.G. Liman, L.G. Hassan Subject(s):