K.O, A., A. C.N, N. A.I, O. C, and A. P.C. “Determination of the Durability of Polyurethane Coating on Mild Steel in Various Soil Media”. International Research Journal of Multidisciplinary Technovation, vol. 4, no. 3, May 2022, pp. 7-13, doi:10.54392/irjmt2232.