Frey, Donnalyn. <br/><br/>
!%@::   a directory of electronic mail addressing & networks / 
Donnalyn Frey and Rick Adams.  
 - 4th edition 
 - Sebastopol, CA :   O'reilly & Associates,   1994. 
 - xix, 640 pages :   illustrations ;   24cm.  
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>9781565920460  1565920465 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Computer networks--Directories. <br/>Electronic mail systems--Directories.