000			00444nam a2200133Ia 4500
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040			_e92113 _aMAIN
041			_aEnglish
082			_a372.7 R197S
100			_aRavinder Kaur
245		0	_aStudy in diagnostic testing and remedial teaching in the use of positive and negative signs in the four fundamental rules of algebra to school children in class seventh
300			_a77 p.
942			_cTH
999			_c86945 _d86945