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

 -  1961 
<br/><br/><label>Standard No.: </label>7,266 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>LIBRARY SCIENCE
<br/><br/><label>Dewey Class. No.: </label>2:970bD65,8 2:55), K1