Levens, A. S.  1900- <br/><br/>
Graphics in engineering design / 
Alexander Levens, William Chalk 
 - 3rd ed. 
 - New York  Wiley  1980 
 - xiv, 736p.  ill.  24cm. 
<br/><br/>Includes indexes 
<br/><br/><label>ISBN: </label>0471096768  RM35.20 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Engineering graphics<br/>Industrial design