A.-K. Mohammed A-H, K. Hussain H, J. Sadiq R. The Effect of Solvent Extraction of Light Lubricating Oil on Viscosity Index and Chemical Composition. IJCPE [Internet]. 2007 Dec. 30 [cited 2024 Nov. 25];8(4):1-12. Available from: https://ijcpe.uobaghdad.edu.iq/index.php/ijcpe/article/view/490