Roy, Ewell Paul. <br/><br/>
Cooperatives :  development, principles, and management / 
Ewell Paul Roy. 
 - 4th ed. 
 - Danville, Ill. :  Interstate Printers & Publishers,  c1981. 
 - x, 611 p. :  ill. ;  25 cm. 
<br/><br/><label>ISBN: </label>0813421438 (pbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Cooperation--United States.<br/>Cooperation.