AHMED, G., Z. Idris, M. Yahaya, and A. I. Muhd. “ASSESSMENT OF GROUNDWATER HEAVY METAL CONTAMINATION IN HADEJIA METROPOLIS, JIGAWA STATE, NIGERIA”. FUDMA JOURNAL OF SCIENCES, Vol. 7, no. 1, Feb. 2023, pp. 47 -52, doi:10.33003/fjs-2023-0701-1156.