Food and Agriculture Organization of the United Nations (United Nations); Data in Emergencies Hub (Food and Agriculture Organization of the United Nations); World Food Programme (United Nations), 'Data in Emergencies Monitoring Household Survey 2022: Round 6 (Sierra Leone)', 2023
Stephen Taylor (Department of Basic Education); Brahm Fleisch (University of the Witwatersrand), 'Early Grade Reading Study II 2017: Wave 1 (South Africa)', 2020