000 00325nam a2200145Ia 4500
020 _a0732964431
082 _b1701
_a500
100 _a"Williamson Ken"
245 0 _aScience World
260 _bMACMILLAN
_aKarachi
_c2000
300 _a266
944 _cBK
999 _c365729
_d365729