Sonibare, J.A., F.A. Akeredolu, J.A. Adejumo, and A.F. Oluwole. 2008. “Aerosol Characterization for Minna, Nigeria by EDXRF Technique and Source Attribution by PCFA and CMB Multivariate Statistical Techniques”. Ife Journal of Technology 17 (1):52-59. https://ijt.oauife.edu.ng/index.php/ijt/article/view/13.