Planning and economic development / 
edited by Ignacy Sachs ; with a foreword by Oskar Lange. 
 - Warszawa :  Polish Scientific Publisher,  1964. 
 - xi, 259 p. : 
<br/><br/><label>ISBN: </label>TBB403 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Economic development.
<br/><br/><label>Dewey Class. No.: </label>338.9  / Pl