BUTHAINAH M. YOUNUS. Determination of Pollution Levels of Hydrocarbons and Heavy Metals (Cobalt - Cadmium - Nickel) in The Soils of Farms Near the Southern Refineries - Basrah City - Southern Iraq. University of Thi-Qar Journal of Science, v. 8, n. 2, p. 67-71, 8 Dec. 2021.