{"id":"000535252","type":"article","title":"Airborne particles aand gases, and their impact on the cultural heritage and its environment. Proceedings of the European workshops held at Ravello, December 12-13th 1989 and December 14-16th 1990","pages":"5-287","container-title":"Pact. Revue du Groupe européen d'études pour les techniques physiques, chimiques et mathématiques appliquées à l'archéologie, 33.1991","issued":{"raw":"1991"}}