Clarke, Sally H. <br/><br/>
Regulation and the revolution in United States farm productivity / 
Sally H. Clarke. 
 - Cambridge ;  New York, NY, USA :  Cambridge University Press,   1994. 
 - xiv, 310 p. :  ill., maps ;  24 cm. 
 - Studies in economic history and policy .
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>052144117X (hc) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agriculture and state--History--United States--20th century.<br/>Agricultural productivity--History--United States--20th century.
<br/><br/><label>LC Class. No.: </label>HD1761  / C53 1994