000 00379nam a2200145 4500
027 _aCS 158 : 1972
_q1972
041 _aeng
080 _a744.3 : 621.7/.9
942 _cSD
110 _aBUREAU OF CEYLON STANDARDS
245 _aCS 158 : 1972 : Specification for T squares (metric units)
260 _aColombo
_bBureau of Ceylon Standards
300 _a6p.
500 _aSTD2371
999 _c177900
_d177900