000 00251nam a2200097Ia 4500
008 160930s9999 xx 000 0 und d
100 _aKulshrestha, S. P. and Pasricha Harpal
245 _aTeaching of Science
260 _aMeerut
_bSurya Pub.
942 _cBK
999 _c4279
_d4279