Heard, W E. <br/><br/>
Trade Technical Drawing :  An approach to CSE. 

 - London :  Macmillan Education Limited,  1972. 
 - p.96 ;   cm.15. 
<br/><br/><label>ISBN: </label>333 13553 9 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Technical Drawing.