000			00382nam a2200133Ia 4500
082			_a600 _bI.S.I
100			_aIndian Standards Institution[ISI]
245			_aSP:21-1983. Summaries of Indian standards for building materials.
260			_aNew Delhi _bIndian Standards Institution _c1983
300			_aix; 496p.
500			_aENG
890			_aIndia
999			_c31448 _d31448