John D. Ryder <br/><br/>
Network Lines and fields 

 - Second 
 - New Delhi  PHI  2005 
<br/><br/><label>ISBN: </label>0000049195 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Lines <br/> Network<br/>fields <br/>Telegraphy(621.382)
<br/><br/><label>Dewey Class. No.: </label>621.382