M. S. I. . Essa and M. . Abdalmajed, “Assessment of Personal Hygiene Attitudes among Primary School Pupils in Umbada Locality, Khartoum state (2018-2020), Sudan”, ABC res. alert, vol. 10, no. 3, pp. 64–71, Nov. 2022, doi: 10.18034/ra.v10i3.639.