00294nam a2200109Ia 4500008004100000041000800041082001800049100003200067245005900099260001900158365000700177230303s9999    xx            000 0 und d  aeng  a621.38275 SEL  aSELLARAJAN (A) KAR (SUBRAT)  aOptical Fiber Communications : Principles and Practice  aNEW DELHIbTMH  cRS