000 00253nam a2200085 4500
080 _a
_b
245 _aIS: 2222-1991; Specification for burnt clay perforated building bricks
100 _aBUREAU OF INDIAN STANDARDS
260 _aNEW DELHI
_bBIS
_c1991
300 _a2p
440 _vWith amendment No.1-1992
999 _c36227
_d36227