Cleverdon, Cyril W. <br/><br/>
Factors determining the performance of indexing systems / by Cyril C leverdon and Michael Keen. 

 - Bedford :  Cyril cleverdon,  1966. 
 - 2 v. in 3. :  ill. ;  28 cm. 
<br/><br/>Includes bibliographical references. 
<br/><br/>  v. 1. Design / by Cyril Cleverdon, Jack Mills and Michael Keen - pt. 1. Text --   v. 2. Test results / by Cyril Cleverdon and Michael Keen . 
<br/><br/><label>LCCN: </label>67-081732 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Indexing<br/>Information storage and retrieval systems.
<br/><br/><label>Dewey Class. No.: </label>025.3