000 00298nam a2200121Ia 4500
041 _aEN
082 _a030
_bKER
100 _aKerrod, Robin .
245 0 _aEncyclopedia of Science. Vol.12:Tools and Tomorrow / Robin Kerrod.
260 _bCanada : Macmillan ,
_c1991
300 _a96
942 _cBK
999 _c20477
_d20477