000 00322nam a2200133Ia 4500
005 20260205052420.0
008 260111s9999||||xx |||||||||||||| ||und||
082 _a373 G959S
100 _aGupta, V K
245 0 _aScience and technology education
260 _aChandigarh
_bArun
_c1996
300 _a477p.
942 _cBK
999 _c114557
_d114557