Uduma A. U., Garba I. L., and Nnachi C. “ASSESSMENT OF THE QUALITY OF SELECTED SOAPS SOLD IN KATSINA METROPOLIS, KATSINA STATE, NIGERIA”. FUDMA JOURNAL OF SCIENCES, Vol. 7, no. 3, July 2023, pp. 266 -9, doi:10.33003/fjs-2023-0703-1867.