Ben Brown and David Shukman . <br/><br/>
All necessay means / 
Brown B. 
 - London :  BBC books ;  1991. 
 - 198 pages. 
<br/><br/>Includes index. 
<br/><br/><label>ISBN: </label>0563363045 
<br/><br/><label>LC Class. No.: </label>DS 79.72  / .B76 1991