Mason, Robert D. <br/><br/>
Statistical techniques in business and economics / 
Robert D. Mason. 
 - 4th ed. 
 - Homewood, Illinois :  Irwin,  1978. 
 - xx, 596 p. : ill. 
<br/><br/><label>ISBN: </label>0256020256 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Commercial statistics.