{"id":"000079947","type":"book","title":"Silification processes related to the pyroclastic levels on the unconformity surface between Buntsandstein and Muschel-Kalk (NW. Iberian ranges, Central Spain","pages":"42-46","container-title":"VI International Flint Symposium: Abstracts (Madrid, october 1991","author":[{"family":"Marfil","given":"R."}]}