000			00317nam a2200145Ia 4500
008			220421s9999||||xx |||||||||||||| ||und||
020			_c250
040			_aET
100			_aSHARMA R.S.
245		0	_aENVIRONMENTAL STUDIES
260			_bEXCELENT SERIES _aNEW DELHI
300			_a188
500			_a64799
942			_cBK
999			_c70762 _d70762