Kimaiyo , P. J., Mutiso , J. and Kosgei , M. (2019) “ Construction of a Five-Level V-Dimensional Modified Third Order Rotatable Designs using a Pair of Pairwise Balanced Designs ”, African Journal of Education,Science and Technology (AJEST), 5(3), pp. Pg 179 – 189. Available at: https://ajest.org/index.php/ajest/article/view/758 (Accessed: 3 April 2026).