Ryan, William James Louden. <br/><br/>
Price theory/ 
by William James Louden Ryan 
 - London,  New York,  Macmillan;  St. Martin's Press,  1958. 
 - 396 p.  illus. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Prices.
<br/><br/><label>Dewey Class. No.: </label>338.52 RYA/P