00330nam a2200109Ia 4500008004100000040002500041082001700066100004700083245003800130260004100168300001100209230627s9999    xx            000 0 und d  aNORSU-SiacNORSU-Sia  a371.102 Sch4  aRichard A. Schmuck and Patricia A. Schmuck 0aGroup processes in the classroom   bWm.C. Brown Company Publishersc1971  a380 p.