000 00296cam a2200121ua 4500
003 OSt
008 210118b ||||| |||| 00| 0 eng d
082 _a666.71
_bIND/GU
245 0 0 _aPrathikaaram
260 _aNew Delhi :
_bIndian Standards Institution ,
_c1978.
300 _a8 ; .
942 _cBK
999 _c261971
_d261971