American agriculture, 1899-1939 :  a study of output, employment, and productivity / 

 - New York :  NBER ,  1942 
 - xxii, 440p. :  ill. ;  24 cm.  
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agriculture--United States<br/>Economic aspects
<br/><br/><label>Dewey Class. No.: </label>630  / NBER