Spatial Analysis of Solar Radiation in the Al-Butnan Region of Libya Using the H(h)_m and H(i_opt)_m Indices During the Period 2005–2023. م ج ج ل [Internet]. 2026 Oct. 1 [cited 2026 Oct. 1];7(2):85-56. Available from: https://jlgs.ly/ojs/index.php/ojsdata/article/view/139