Longman.  <br/><br/>
Longman dictionary of contemporary english 

 - London :   Longman   2009. 
 - 294.  
<br/><br/><label>ISBN: </label>0 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Engineering,
<br/><br/><label>Dewey Class. No.: </label>050  / LON