Gradstein, Felix M., ed.  <br/><br/>
The geologic time scale  [eBook] 

 - Amsterdam  Elsevier  2012 
 - Online resource 
<br/><br/><label>ISBN: </label>978-0-444-59425-9 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geological TimeGeochronology