The essentials of electronic communications / 
staff of Research and Education Association ; M. Fogiel, director 
 - Piscataway, N.J. :  Research and Education Association,  c1989 
 - 2 v. (vi, 168 p.) :  ill. ;  21 cm. 
<br/><br/><label>ISBN: </label>0878915893 (v. 1) 0878915907 (v. 2) 9780878915903 (v. 2) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Digital communications--Handbooks, manuals, etc.<br/>Digital electronics--Handbooks, manuals, etc.