Bray, James O. <br/><br/>
Technical change in corn production in the United States, 1870-1960 / 
James O. Bray & Patricia Watkins 
 - Stanford :  Food Research Institute (FRI) , 
 - 751-765p. :  ill. ;  25 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agriculture<br/>Crops--United States
<br/><br/><label>Dewey Class. No.: </label>633  / BRA