00241nam a2200109Ia 4500008004100000041000800041082002000049100001700069245002700086260000900113300000900122211209s1979    xx            000 0 und d  aeng  a530 N79 SUB/LAL  aSUBRAMANIYAM  aPRINCIPLES OF PHYSICS   c1979  a1014