Gradstein, Felix M et, al.. <br/><br/>
Geologic time scale 2012 

 - 7th 
 - New York  Elsevier  2012 
 - 435 
<br/><br/><label>ISBN: </label>9780444593900 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geologic time scale 2012
<br/><br/><label>Dewey Class. No.: </label>551.701 GRA