Rettke, Mari. , <br/><br/>
Practical data sommunications / 
Mari Kettke. 
<br/><br/><label>ISBN: </label>0070676674 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Data transmission systems.
<br/><br/><label>LC Class. No.: </label>TK5105   / .R37 1990