Rettke, Mari. <br/><br/>
Practical data communications / 
Mari Rettke. 
 - New York :  Mitchell McGraw-Hill,  c1990. 
 - viii, 216 p. :  ill. ;  28 cm. 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>0070676674 
<br/><br/><label>LCCN: </label>88062421  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Data transmission systems--Programmed instruction.<br/>Computer networks--Programmed instruction.
<br/><br/><label>LC Class. No.: </label>TK5105  / .R48 1990 
<br/><br/><label>Dewey Class. No.: </label>384.3