Obrien, Derek. <br/><br/>
Bournvita book of knowledge 6 

 - 1st edition 2005. 
 - New Delhi :  Penguin Books  2021 
 - 350 pages.  
<br/><br/><label>ISBN: </label>0143 335235 
<br/><br/><label>Subjects--Topical Terms: </label> GT 
<br/><br/><label>Dewey Class. No.: </label>30  / OBR