The structure of economic science :  essays on methodology / 
Edited by Sherman Roy Krupp. 
 - New Jersey :   Prentice-Hall,   c 1966. 
 - vi, 282 p. ;  24 cm. 
<br/><br/> Includes index. 
<br/><br/>337  337 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Old age pensions--United States.
<br/><br/><label>Dewey Class. No.: </label>330.1 / K944s