00278nam a2200109Ia 4500008004100000082001700041100001400058245003800072250001200110260003800122300000800160240913s9999||||xx |||||||||||||| ||und||  a004.6  HOR/C  aRay horak 0aCommunication system and networks  a3rd Ed.  bWiley Publishing Inc.aNULLc2002  a978