00487pamaa2200169 4500 0000021257 20090130090000.0 0135210224 (pbk) 621.382 REA 1998 TK5102.9 REA 1998 Read The essence of communications theory Richard Read. New York : Prentice Hall, 1998.. ix, 211p.; 24cm. Essence of engineering Signal theory (Telecommunication) Digital communications