S. K. Essa, and D. A. AL- jibury. “HEAVY METALS POLLUTION FOR SOILS IN SOME OF ROADS AND SQUARES OFBAGHDAD CITY CENTER”. IRAQI JOURNAL OF AGRICULTURAL SCIENCES, vol. 48, no. 6 A, Jan. 2017, pp. 1456-72, https://doi.org/10.36103/r53fxx57.