Uroko, R., Okpashi, V., Etim, N. and Fidelia, A. 2019. Quantification of heavy metals in canned tomato paste sold in Ubani-Umuahia, Nigeria. Journal of Bio-Science. 28, (Dec. 2019), 1–11. DOI:https://doi.org/10.3329/jbs.v28i0.44705.