Nelson, John A <br/><br/>
Drafting for trades and industry  mechanical and electronic 
John A. Nelson. 
 - Albany  Delmar Publishers  c1979 
 - 317 p.  ill.  31 cm. 
<br/><br/><label>ISBN: </label>0827318464 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electronic drafting<br/>Machinery--Drawings.<br/>Mechanical drawing