{"id":"000030490","type":"book","title":"Observations of freeze-up and break-up of the Yukon River at Beaver, Alaska. - Cambridge","container-title":"Journal of glaciology ; 2.1955, no. 17, S. 488-495 : 12 Ill. ; 2 Tab","author":[{"family":"Williams","given":"John R."}],"issued":{"raw":"1955"}}