00330nam a2200133Ia 4500008004100000020001500041082001900056100001600075245003700091260002900128300000800157650001700165653001400182170901s1986    xx            000 0 und d  a1850911606  a001.6442bJ57D  aJones, J.A. 0aDatabases in Theory and Practice  aLondonbKogan Pagec1986  a324  aGeneralities  aDatabases