00347nam a2200169Ia 4500008004100000040000800041082001100049082000800060100001600068245002300084260001100107260001800118260000900136300001200145300000900157300001100166151127s9999    xx            000 0 und d  aeng  aCHI502  bUTI  aUtial, Ivar  a101 Science games   aDelhi   bPustak Mahal   c1991  a101 p.   bill.  c24 cm.