St. Amand, Joseph V. <br/><br/>
A guide to packet-switched, value-added networks / 
Joseph V. St. Amand. 
 - New York :  McGraw-Hill Book Company,  1986. 
 - X, 134 s. :  il. ;  24 cm. 
 - The McGraw-Hill Database/Data Communications Series .
 - The McGraw-Hill Database/Data Communications Series .
<br/><br/>Bibliogr. s. 128-129. 
<br/><br/><label>ISBN: </label>0070544697 
<br/><br/><label>Universal Decimal Class. No.: </label>621.398