{"id":"000833477","type":"book","title":"The African map in the 18th and 19th centuries","publisher":"Egyptian Geological Survey and Mining Authority","publisher-place":"Cairo","container-title":"Annals of the Geological Survey of Egypt, 5.1975: S. 25-31","author":[{"family":"Hagedorn","given":"Horst"}],"issued":{"raw":"1975"}}