{"id":"000030432","type":"book","title":"Volcanic ash layers of recent age at Banff National Park, ALberta, Canada. - Ottawa, Ontario","container-title":"Canadian journal of earth science ; 4.1967, S. 155-161 : 2 Ill. ; 3 Tab","author":[{"family":"Westgate","given":"J. A."}],"issued":{"raw":"1967"}}