000 00304nam a2200133Ia 4500
008 160316s2004 xxu||||| |||| 00| 0 eng d
020 _a
100 _aDas,Bishnu Charan
245 _aEducational Technology
250 _a
260 _aLUDHIANA
_bKALYANI PUBLISHERS
_c2004
300 _a162
700 _a
_a
999 _c3941
_d3941