Derfler, Frank J. <br/><br/>
TRS-80 data communication systems / 
Frank J. Derfler, Jr. 
 - Englewood Cliffs, N.J. :  Prentice-Hall,  c1982. 
 - xi, 159 p. :  ill.   24 cm. 
<br/><br/>Includes index. 
<br/><br/><label>ISBN: </label>013931220X (pbk.);0139312382 
<br/><br/><label>LCCN: </label>82003834 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Data transmission systems.;TRS-80 computers.
<br/><br/><label>LC Class. No.: </label>TK5105  / .D483 1982 
<br/><br/><label>Dewey Class. No.: </label>1.644  / DER 1982.