00257nam a2200109Ia 4500008004100000041000800041082002000049100001200069245002200081260003600103300000800139211209s1989    xx            000 0 und d  aeng  a621.385 N89 HAB  aHABB, M  aMODERN TELEPHONY   aNEW JERSEYbPRENTICE HALLc1989  a193