00239nam a2200109Ia 4500008004100000041000800041082001200049100002000061245003100081260000900112300000800121211209s1975    xx            000 0 und d  aeng  aSUB/BRI  aSUBRAMANIAYAM S  aELECTRICITY AND MAGNETISM   c1975  a727