000			00334nam a2200121Ia 4500
008			220201s1971 xx 000 0 eng d
082			_bISI
100			_aI.S.I
245		0	_aSpecificaton for heavy-duty burnt clay building birds IS: 2180-1971
260			_bIndian Standard Institute, Manak bhawan _c1971
300			_a6
942			_2ddc
999			_c19856 _d19856