Nyakundi Omwando Cornelious, and Evans Mbuthi Kilonzo. “Robustness of Higher Levels Rotatable Designs for Two Factors Against Missing Data”. International Journal of Advances in Scientific Research and Engineering (IJASRE), ISSN:2454-8006, DOI: 10.31695/IJASRE, vol. 7, no. 4, Apr. 2021, pp. 80-83, doi:10.31695/IJASRE.2021.34003.