Kekeba, S.K. 2019. Concentrations of Some Heavy Metals (Lead, Cadmium, Copper and Zinc) in High Traffic Density Roadside Soils in Selected Towns of Oromia Regional State, Ethiopia. The International Journal of Science & Technoledge. 7, 3 (Mar. 2019). DOI:https://doi.org/10.24940/theijst/2019/v7/i3/ST1903-021.