Ryan, William James Louden. <br/><br/>
Price theory. 

 - London : New York :  London : New York :  Macmillan ; St. Martin's Press,  Macmillan ; St. Martin's Press,  1958 
<br/><br/> Reprint of 1965. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Prices.