Hamadamin, R., Salih, M., & Aziz, R. (2019). Environmental Impacts of Shewashok Oil Field on Sheep and Cow Meat Using Vital Trace Elements as Contamination Bioindicators. UHD Journal Of Science And Technology, 3(1), 1-8. doi:10.21928/uhdjst.v3n1y2019.pp1-8