000 00237nam a2200073 4500
080 _a
_b
245 _aIS: 1161 - 1979 (Reaffirmed 1990); Specification for steel tubes for structural purposes
700 _aBureau of Indian Standards
260 _aNew Delhi
_bBIS
_c1979
300 _a13+2+1+1p
999 _c34647
_d34647