AHMED, Hassan Hussein Idris u. a. Hunter-Gatherers and Early Food Producing Societies in Northeastern Africa. Heidelberg: Propylaeum,2017. DOI: 10.11588/propylaeum.252.335. Disponível em: https://books.ub.uni-heidelberg.de/propylaeum/catalog/book/252.. Acesso em: 27 apr. 2024.