Perri, T.- owunari, V. E. Weli, B. Poronakie, and T. Bodo. “Distribution of Respiratory Tract Infectious Diseases in Relation to Particulate Matter (PM2.5) Concentration in Selected Urban Centres in Niger Delta Region of Nigeria”. Journal of Geographical Research, vol. 5, no. 1, Jan. 2022, pp. 1-11, doi:10.30564/jgr.v5i1.3710.