DETERMINED UNCERTAINTY MODELS OF REFERENCE MATERIAL PROPERTIES AND THE EN 338 STRENGTH CLASS OF NIGERIAN GROWN TERMINALIA IVORENSIS (BLACK AFARA) TIMBER. NIJOTECH [Internet]. 2019 Mar. 27 [cited 2026 Apr. 16];38(2):302-13. Available from: https://www.nijotech.com/index.php/nijotech/article/view/1967