Warnken, Kelly <br/><br/>
The information brokers : howto start and operate your own fee-based service / by Kelly Warnken 

 - New York :  Bowker,  1981 
 - 154 p. 
 - Information management series ; 2 .
<br/><br/> Monografía 
<br/><br/><label>ISBN: </label>0835213471 0835217639 (rustica) 
<br/><br/><label>Subjects--Index Terms: </label>Servicios de Información - E.U 
<br/><br/><label>LC Class. No.: </label>Z674.5U5/W36