Etter, D.m. <br/><br/>
Lotus 1-2-3 / 
D.M. Etter 
 - 4th ed 
 - Massachusetts :  Addison-Wesley,  1992 
 - 436 p. :  charts 
<br/><br/><label>ISBN: </label>0201913356 
<br/><br/><label>Subjects--Topical Terms: </label><br/>LOTUS 1-2-3 (Computer programs)
<br/><br/><label>Dewey Class. No.: </label>621.C642  / E83L