000 00331nam a2200145Ia 4500
008 131111s9999 xx 000 0 und d
100 _aSood,T.K
245 _aNew direction in science teaching
260 _aChandigarh
260 _bKhol
260 _c1989
300 _a326p.
650 _aEducation
_aTeaching
763 _a6583
999 _c44335
_d44335