000			00335nam a22001337a 4500
020			_a8185565465
082			_a378.03 _bSAH.O
100			_aSahoo, P K.
245			_aOpen learning system / _cby P K Sahoo.
260			_aNew Delhi : _bUppal publishing house, _c1994.
300			_a316p.
650			_aOpen learning system.
942			_cBK
999			_c369688 _d369688