Townsend, Carl. <br/><br/>
Mastering excel 4 for windows/ 
Carl Townsend 
 - New Delhi:  BPB publications,  1993. 
 - 775p. 
<br/><br/><label>ISBN: </label>81 7029 230 1 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Excel.