U E M <br/><br/>
How things work ; Vol-II 

 - New Delhi  Harper Collins  1992 
 - 592  Pb 
<br/><br/><label>ISBN: </label>0-586-08173-9 
<br/><br/><label>Subjects--Facted Index Terms: </label><br/>
<br/><br/><label>Dewey Class. No.: </label>621.03