Mohamed, H., F. F. Ali, M. O. Elamin, and E. A. Faraj. “ASSESSMENT OF WATER AND ENVIRONMENTAL SANITATION SERVICES OF PRIMARY EDUCATION (KHALWA) AT EAST NILE LOCALITY, SUDAN, 2017”. International Journal of Research -GRANTHAALAYAH, vol. 6, no. 7, July 2018, pp. 16-22, doi:10.29121/granthaalayah.v6.i7.2018.1279.