Frye, Curtis D. <br/><br/>
Microsoft office excel 2007 :bstep by step 
Curtis D. Frye 
 - Washington  Microsoft Press  2007 
 - lxiii, 367p.  ill.  23cm.  +cd rom 
<br/><br/> includes index :p.357 - 367 
<br/><br/><label>ISBN: </label>9780735623040 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Business--computer programs<br/>Electronic spreadsheets