Computers and information systems : an introduction 
Martin Jr., E. W. 
 -  Richard D. Irwin, Inc., and The Dorsey Press.  1973 
 - xviii, 635 pages. 
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<br/><br/><label>ISBN: </label>0-256-01452-3 
<br/><br/><label>Dewey Class. No.: </label>001.642 M36 1973