1987 encyclopedia of information systems and  services 

 - 7th Ed.; 
 - New York :  Frederick G.Ruffner,  1971. 
 -  29cm 
<br/><br/><label>ISBN: </label>081032492X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Library Science<br/>Information Science
<br/><br/><label>Dewey Class. No.: </label>025.0403  / ENC