{"id":"000030705","type":"book","title":"A chemical and mineralogical examination of the ceramic sequence from Tikal, El Peten, Guatemala. - New Haven, CT","container-title":"American journal of science ; 267.1969, S. 465-477 : 6 Ill. ; 7 Tab","author":[{"family":"Cowgill","given":"Ursula M."}],"issued":{"raw":"1969"}}