Croucher, Phil. <br/><br/>
Communications & networks :  a handbook for the first time user /  [Book]. 
Phil Croucher.  
 - Wilmslow :   Sigma,   1989. 
 - 180p. :   ill. ;   23cm. 
<br/><br/> Bibliography: p155. _ Includes index. 
<br/><br/><label>ISBN: </label>1850581363 (pbk) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Computer networks.