Odumosu JO, Adesina EA, Nnam VC, Nwodo GO. PRACTICAL OPTIONS FOR THE RE-DEFINITION OF THE NIGERIAN VERTICAL REFERENCE SYSTEM: A CASE STUDY OF LAGOS STATE. Int. J. Renew. Energ & Environ [Internet]. 2026 May 15 [cited 2026 May 15];4(2):45-60. Available from: https://ijree.com/index.php/publications/article/view/43