Wiesner LREF <br/><br/>
Telegraph and Data transmission over shortwave radio links 

 -  1977 
 - 163p.  cm. 
<br/><br/><label>Standard No.: </label>35981 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Dewey Class. No.: </label>D65,47, L7