Walker, James C.G. <br/><br/>
Earth history :  The several ages of the Earth / 
James C.G. Walker. 
 - Boston ;  Portola Valley :  Jones & Bartlett Publ. ,  1986. 
 - VII, 199 p. 
<br/><br/><label>ISBN: </label>0-86720-022-7 0-86720-023-5 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Earth science<br/>Human evolution<br/>Paleontology