Froyen, Richard T., <br/><br/>
Principles of economics :  instructor's manual / 
Richard T. Froyen, Doulas F.Greer. 
 - New York :  MacMillan,  1989. 
 - 838 pages :  illustration ;  26 cm. 
<br/><br/><label>ISBN: </label>0023394307 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Economics.