00372 a2200157 4500 9971511703 621.382 HAY 3865 4778 Haykion, Simion Communication systems 3rd Singapore John wily 1995 1995 xvi,872p. 24cm COMMUNICATIONS ENGINEERING SR 32847 32847 0 0 0 0 SRC MAIN MAIN REF 2008-08-20 0 621.382HAY 6238 2017-08-31 00:00:00 0.00 2016-10-31 SR