{"id":"001404690","type":"article","title":"High resolution satellite images and Differential GPS in geomorphological and geoarchaeological research on Boni Island (Fourth Nile Cataract, north Sudan)","publisher":"Heinrich-Barth-Institut","publisher-place":"Köln","pages":"92-95","container-title":"Atlas of cultural and environmental change in arid Africa","issued":{"raw":"2007"}}