Mason, Robert Deward. <br/><br/>
Statistical techniques in business and economics 

 - 9th ed. 
 - Boston.  irwin McGraw Hill  1996 
 - xix, 871 p 
<br/><br/><label>ISBN: </label>256139016 
<br/><br/><label>Dewey Class. No.: </label>330.015195