000			00341nam a2200145Ia 4500
008			241226s9999 xx 000 0 und d
020			_a0
082			_a628 _bKAT
100			_aKatyal, R
245		0	_aEmvironmental pollution
260			_aNew Delhi : _bAnmol Pub, _c1998.
300			_a301
365			_a250
650			_aCivil Engineering
999			_c131515 _d131515