{"id":"000281612","type":"book","title":"The ancient chert mines at Wadi el-Sheikh (Egypt)","pages":"165-171","container-title":"The human uses of flint and chert. Proceedings of the Fourth International Flint Symposium, Brighton 10-15 April 1983","author":[{"family":"Weisgerber","given":"Gerd 1938-2010."}]}