A Geologic time scale / 
W.B. Harland ... [et al.] ; assisted by K.E. Fancett. 
 - Cambridge [England] :  Cambridge University Press,  1982. 
 - xi, 131 p. :  ill. ;  31 cm. 
 - Cambridge earth science series. .
<br/><br/> Includes index. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>ISBN: </label>0521247284 (hbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geological time.