Indian standard specification for mild steel tubes, tubulars and other wrought steel fittings  pt. 2, mild steel tubulars and other wrought steel pipe fitting 
Indian Standards Institution 
 - New Delhi  Indian Standards Institution  1970 
 - 38p. 
<br/><br/> IS 1239 : Part 2 : 1969 
<br/><br/><label>Universal Decimal Class. No.: </label>083.7:621.643.23  / ISI