000			00351nam a2200133Ia 4500
008			240913s9999||||xx |||||||||||||| ||und||
082			_aGS 372.357 AST/A
100			_aK Asthana and Meera Asthana
245		2	_aA Text book of environmental studies
250			_aNULL
260			_bS Chand and Co _aNew Delhi _c2006
300			_a460
942			_cBKS
999			_c10818 _d10818