Vickery, B C <br/><br/>
On retrieval system theory 

 - 2nd ed. 
 - London:   Butterworths,   1965 
 - xii, 191p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Information science
<br/><br/><label>Subjects--Index Terms: </label>Information retrieval Indexing 
<br/><br/><label>Universal Decimal Class. No.: </label>D 002:025.4  / K11;K5-