Economic concepts : a programmed approach 
Bingham, Robert C. 
 - 7th ed. 
 -  McGraw-Hill,  1984 
 - xii, 432 p. 
<br/><br/>
<br/><br/><label>ISBN: </label>0-07-044937-6 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Economics -- Programmed instruction.
<br/><br/><label>Dewey Class. No.: </label>330.077 B52e 1984