Townley, Helen M. <br/><br/>
Systems analysis for information retrieval / 
Helen M. Townley. 
 - London :  Deutsch in association with the Institute of Information Scientists,  1978. 
 - xiv, 121 p. :  ill, form ;  23 cm. 
 - Institute of Information Scientists .
<br/><br/> A Grafton book. 
<br/><br/>Includes bibliographical references : p.110-115 and index. 
<br/><br/><label>ISBN: </label>0233969209 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Information storage and retrieval systems.<br/>System analysis.