Vriens, Drik <br/><br/>
Information and communication technology for competitive intelligence / 
Drik Vriens 
 - London:  IGP  2004 
 - x, 305p.; 
<br/><br/><label>ISBN: </label>9 781591 401421 
<br/><br/><label>Dewey Class. No.: </label>685.47  / VRI