{"id":"000029239","type":"book","title":"Paleoecological and stratigraphic significance of the muskrat in pleistocene deposits. - Boulder, CO","container-title":"Bulletin of the Geological Society of America ; 81.1970, S. 3733-3738 : 7 Ill","author":[{"family":"Nelson","given":"Robert S."}],"issued":{"raw":"1970"}}