Otto, M. S., A. J. Oladiran, F. A. Oluwasesan, F. U. . Muhammad, and A.A Sule. “QUARTERLY VARIATION OF TROPOSPHERIC SURFACE REFRACTIVITY IN ILORIN, NIGERIA”. Malaysian Journal of Science, vol. 42, no. 3, Oct. 2023, pp. 85-91, doi:10.22452/mjs.vol42no3.11.