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008			220612s9999 xx 000 0 und d
020			_a9788189983055
082			_bGUP
100			_aGUPTA, U.C.
245		0	_aTEACHING SCIENCE
260			_bKHEL SAHITYA KENDRA, NEW DELHI _c2007
300			_a366
650			_aEducation
942			_cBK
999			_c8858 _d8858