Using 1-2-3:release 2.4 /   Textual Documents 
NULL. 
 - New Delhi :   Prentice Hall of India ,   1987. 
 - NULL ;   NULL. 
<br/><br/><label>Subjects--Index Terms: </label>Sofgtware packages 
<br/><br/><label>Dewey Class. No.: </label>005.369LOT  / USI