00261nam a2200109Ia 4500008004100000041000800041082001900049100001300068245003100081260003100112300000800143211209s1977    xx            000 0 und d  aeng  a541.37 N77 GEL  aGELLER S  aTOPICS IN APPLIED PHYSICS   aNEW YORKbHEIDELBERGc1977  a242