Las necrópolis meroíticas del grupo "X" y cristianas de Nag-el-Arabpor Manuel Pellicer y Miguel Llongueras, con la colaboración de Juan Zozaya e. I. Vázquez de Acuña1965PDF13 MBES
Savage Life in the Black Sudan; an Account of an Adventurous Journey of Exploration Amongst Wild & Little Known Tribes Inhabiting Swamps, Dense Forests, Mountain-tops & Arid Deserts Hitherto Almost Unknown, with a Description of Their Manner of Living, Secret Societies & Mysterious & Barbaric RitesCharles Domville-Fife1927EN