00383nam a2200109Ia 4500008004100000020001900041082001800060100002000078245007500098260005100173650004900224240817s9999    xx            000 0 und d  a 0-201-09590-4  a001.535 W64,p  aWilensky,Robert 0aPlaning and understanding: A computational approach to human reasoning  c1983a Londonb Addition-Wesley Publishing Co.  a Computer science. 2.Artificial intelligence