Clarke, Donald. <br/><br/>
The encyclopedia of :How it works:From abacus to zoom lens /  
edite by Donald Clarke. 
 - 1st ed /  
 - London :   Marshall Cavendish Books Limited. 
 - 245p ;  
<br/><br/><label>ISBN: </label>0 85685 304 6 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Technology
<br/><br/><label>Dewey Class. No.: </label>Fk  / M2