00309nam a2200121Ia 4500001000500000005001700005008004100022082001200063100001600075245005000091260002200141650002400163360520261006003722.0120911s9999    xx            000 0 und d  a546 CAR  aE. Cartmell  aValency and molecular structure / Cartmell E.  aButterworth & Co.  aChemistry inorganic