Farwa Amjad, M.Sc Chemistry, 2013 Supervised by Dr. Sheikh Asrar Ahmad, Decolourization of used vegetable oil by bentonite clay / Farwa Amjad - Lahore : Division of Science & Technology, University of Education, 2013 - 53 p. ISBN: (hbk) Subjects--Topical Terms: Decolourization--Vegetable--Bentonite Dewey Class. No.: 543.5 / D3582