Lancaster, F.W. <br/><br/>
Information retrieval systems; characteristics, testing and evaluation. 

 - New York :  J. Wiley,  1968. 
 - Information sciences series .
 - Hayes, R.M.  ed. Becker, Joseph  ed. .
 - Information sciences series .
<br/><br/><label>Subjects--Topical Terms: </label><br/>INFORMATION RETRIEVAL<br/>INFORMATION SYSTEMS<br/>DOCUMENTATION