000 00342nam a2200121Ia 4500
008 220201s1967 xx 000 0 eng d
082 _bISI
100 _aI.S.I
245 0 _aSpecification for timber door, window and ventilator frames IS: 4021-01967
260 _bIndian Standard Institute, Manak bhawan
_c1967
300 _a16
942 _2ddc
999 _c19862
_d19862