Down, P. J. <br/><br/>
Fault diagnosis in data communications systems / 
by P.J. Down 
 - Manchester :  NCC Publications,  1977 
 - xvii, 189 p. :  ill. ;  21 cm. 
<br/><br/>Bibliography : p. 93-95 
<br/><br/><label>ISBN: </label>0850121868 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Online data processing