Mason, Robert D. (Robert Deward),  1919-. <br/><br/>
Programmed learning aid for business and economic statistics / 
Robert D. Mason ; coordinating editor, Roger H. Hermanson. 
 - Homewood, Ill. ;  Learning Systems Co.,  1970. 
 - 164 p. ;   6 cm. 
 - Irwin programmed learning aid series. .
<br/><br/> 'Self review in business and economic statistics'. 
<br/><br/><label>ISBN: </label>0256001197 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Statistics.