Amand, Joeph V. St. <br/><br/>
A Guide to Packet-Switched, Value-Added Networks / 
Joseph V. Amand St. 
 - New York :  McGraw-Hill Book Company,  1989. 
 - X, 134 s. :  il. ;  24 cm. 
 - (The McGraw-Hill Database/Data Communications Series) .
<br/><br/>bibliogr 
<br/><br/><label>ISBN: </label>0070544697 
<br/><br/><label>Uniwersalna Klasyfikacja Dziesiętna: </label> 681.32:621.38