{"id":"001405266","type":"book","title":"The Gilf Kebir and Lower Wadi Howar","pages":"249-258","container-title":"Environmental change and human culture in the Nile Basin and Northern Africa until the second millennium B.C. Proceedings of the international symposium, Dymaczewo near Poznań 5-10 September 1988","author":[{"family":"Kröpelin","given":"Stefan."}],"issued":{"raw":"1993"}}