Walter, M., <br/><br/>
Encyclopeadia of Internet & Web Vol.3(N-Z) 

 - Delhi:  Ivy Publishing House,  c2002. 
 - 516-820 p.:  [5E] 
<br/><br/><label>ISBN: </label>8178900432 
<br/><br/><label>Dewey Class. No.: </label>004.67803  / WAL/ENC