000 00280nam a2200121Ia 4500
100 _aHester, R E
020 _a0-85186-907-6
942 _cBK
245 _aUnderstanding Our Environment
260 _aThe Royal Chemistry, London
_c1986
082 _a333.7 Hes
300 _axiii; 333
999 _c63943
_d63943