Chapman, D Brent <br/><br/>
Building Internet fire walls 
by D Brent Chapman and Elizabeth D Zwicky 
 - USA  O'Reilly & Association  1995 
 - xxvi,517P. 
<br/><br/><label>ISBN: </label>1565921240 
<br/><br/><label>Dewey Class. No.: </label>005.8  / N952;1