{"id":"000830464","type":"book","title":"33 000-year old chert mining site and related Homo in the Egyptian Nile Valley","container-title":"Nature, 309.1984, No. 5967: S. 342-344 (= S. 1-3), Ill","author":[{"family":"Vermeersch","given":"P. M."}],"issued":{"raw":"1984"}}