000 00287nam a2200121Ia 4500
008 220201s1968 xx 000 0 eng d
082 _bISI
100 _aISI
245 0 _aSpecification for hollow cement concrete block
260 _aNew Delhi
_bISI
_c1968
300 _a19
942 _2ddc
999 _c20191
_d20191