TY - BOOK AU - Roddy,Dennis AU - Coolen,John TI - Electronic communications SN - 8120309847 AV - TK5101 .R56 1995 U1 - 621.382 20 PY - 1997/// CY - New Delhi PB - Prentice Hall of India KW - Telecommunication KW - Electronic communications N1 - Includes index ER -