Frey, Donnalyn. <br/><br/>
A directory of electronic mail addressing and networks / 
Donnalyn Frey and Rick Adams. 
 - 2nd rev. ed. 
 - Sabastopol, Calif. :  O'Reilly & Associates,  1990. 
 - xvi, 420 p. 
 - UNIX communications .
<br/><br/><label>ISBN: </label>0937175153 
<br/><br/><label>LCCN: </label>92026225 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electronic mail systems.