Frey, Donnalyn <br/><br/>
A directory of electronic mail addressing and networks / 
Donnolyn Frey and Rick Adams 
 - 2nd ed. 
 - Sebastopol, Calif. :  O'Reilly & Associates,  1990 
 - 420 p. ;  24 cm. 
<br/><br/><label>ISBN: </label>0937175153 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electronic mail systems--Directories