Abubakar, Aminu Abubakar, and Mohammed Sidi. “Determination of X‑ray Shielding Thickness in Two Tertiary Hospitals in Kano Metropolis, Nigeria”. West African Journal of Radiology, vol. 26, no. 2, Dec. 2019, pp. 90-93, https://doi.org/10.4103/wajr.wajr_28_18.