Sherman, Chris, <br/><br/>
The Invisible Web :  uncovering information sources search engines can't see / 

 - Medford, N.J. :  CyberAge Books,  c2001. 
 - xxix, 439 p. : 
<br/><br/><label>ISBN: </label>091096551X 
<br/><br/><label>Dewey Class. No.: </label>025.04  / SHE