Gregory, E. N. <br/><br/>
Welding symbols on drawings / 
E. N. Gregory and A. A. Armstrong 
 - Boca Raton:   CRC Press,   2005 
 - xiii, 55 p.:   ill.;   28 cm. 
<br/><br/><label>ISBN: </label>0849335914 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Welding