{"id":"000028610","type":"book","title":"Measuring geologic time : its difficulties . - Washington, D.C","container-title":"Smithsonian Institution <Washington, D.C> : Smithsonian report for 1937 : publication ; 3458, S. 235-254: 3 Ill. ; 2 Taf","author":[{"family":"Lane","given":"Alfred C."}],"issued":{"raw":"1938"}}