Negedu AA, Ono MN. ESTABLISHMENT OF ORTHOMETRIC HEIGHT CONTROLS IN THE EASTERN PART OF KOGI STATE USING GNSS AND EGM 2008. FJS [Internet]. 2024 Apr. 30 [cited 2025 Oct. 29];8(2):180-7. Available from: http://www.fjsadmin.fudutsinma.edu.ng/index.php/fjs/article/view/2346