00327nam a2200109Ia 4500008004100000022001800041040002500059082001700084100001600101245006400117260003600181240215s9999    xx            000 0 und d  a1-55798-415-8  aNORSU-DumcNORSU-Dum  a302 L56 1997  aLewin, Kurt 0aResolving Social Conflicts & Field Theory in Social Science  bHarper and Row Publishersc1997