Vickery, B. C. <br/><br/>
Techniques of information retrieval 

 - London:   Butterworths,   1970 
 - viii, 262p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Information science
<br/><br/><label>Subjects--Index Terms: </label>Retrieval Structure of classification System evaluation 
<br/><br/><label>Universal Decimal Class. No.: </label>D 002  / L0