00271nam a2200109Ia 4500008004100000041000800041082002300049100001700072245005500089260000900144300000800153211209s1978    xx            000 0 und d  aeng  a621.385483 N78 LEN  aLENK, JOHN D  aHAND BOOK OSCILLOSCOPES : THEORY AND APPLICATIONS   c1978  a212