{"id":"000027911","type":"book","title":"Petroglyphs and pictographs in British Columbia.- Chicago, IL","container-title":"International Congress of Americanists <19, 1949, New York-NY.>: proceedings ; 3, S. 66-79 : 18 Ill","author":[{"family":"Gjessing","given":"Gutorm"}],"issued":{"raw":"1952"}}