Helsel, Jay D <br/><br/>
Mechanical drawing : CAD-communications 
Jay D. Hselel 
 - 11th ed 
 -  c1990. 
<br/><br/><label>ISBN: </label>0070223378 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Mechanical drawing--ME
<br/><br/><label>Dewey Class. No.: </label>604.2 FRE