000 00363nam a2200145Ia 4500
020 _a1856974561
082 _b2531
_a500.030
100 _a"Encyclopedia"
245 0 _aScience Encyclopedia (U.H.Frequency)
260 _bKingfisher Publications
_aLondon
_c1991
300 _a768
944 _cBK
999 _c474876
_d474876