Information retrieval experiment 

 - London :  Butterworths,  1981. 
 - 352p.  24cm 
<br/><br/><label>ISBN: </label>0408106484 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Library and Information Science
<br/><br/><label>Dewey Class. No.: </label>025.04  / INF