00250nam a2200109Ia 4500008004100000041000800041082002300049100001400072245003700086260000900123300000800132211209s1978    xx            000 0 und d  aeng  a620.11 N77 GUP/GUP  aGUPTA A K  aMATERIALS SCIENCE AND PROCESSES   c1978  a290