Wiesner, Lothar <br/><br/>
Telegraph and data transmission over shortwave radio links  fundamental principles and networks 
Lothar Wiesner 
 - 3rd ed. 
 - Berlin  Siemens AG  c1984 
 - 199p.:  ill.;  21cm 
<br/><br/><label>ISBN: </label>0471905992 
<br/><br/><label>Subjects--Topical Terms: </label><br/>DEP,QEP,DTK,QTK<br/>Radio,shortwave