Specification for pre-hardened and tempered carbon and low alloy round steel wire for springs for general engineering purposes / 
British Standard Institution 
 - 8 leaves :  illustrations ;  20 cm. 
 - British standard ;  BS 2803 : 1980 .
 - British standard ;  BS 2803 : 1980 .
<br/><br/><label>ISBN: </label>0580114244