000			00342nam a2200133Ia 4500
008			240913s9999||||xx |||||||||||||| ||und||
082			_aGS 628.1025 WAT
100			_aB.C Punmia and Ashok Kumar Jain
245		0	_aEnvironmental engineering
250			_aNULL
260			_bLaxmi Publication _aDelhi _c1990
300			_a170 p
942			_cBKS
999			_c6195 _d6195