Mason,Robert D. <br/><br/>
Programmed learning aid for business and economic statistics 

 -  Learning systems company  1970 
 - ix,164p.  ill,25cm. 
<br/><br/> includes indexes. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Business and economic
<br/><br/><label>Dewey Class. No.: </label>519.5 MAS