000			00280nam a22001337a 4500
999			_c156225 _d156225
082			_a _b
100			_aTara Chand
245			_aEducational technology/ _cby Tara Chand.
260			_aNew Delhi: _bAnmol, _c1990.
300			_a415p.
650			_a
700			_a
942			_cBK