Loomis, Ralph A.,  1922- <br/><br/>
Productivity of agriculture, United States, 1870-1958  / 
by Ralph A. Loomis and Glen T. Barton. 
 - Washington, :  U. S. Dept. of Agriculture ,  1961. 
 - iv, 63p. :  diagrs. tables. ;  24 cm. 
 - U. S. Dept. of Agriculture, Technical bulletin ;  no. 1238. .
<br/><br/> Literature cited p. 38-39 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agriculture--Economic aspects--United States.<br/>Farm income--United States.
<br/><br/><label>Dewey Class. No.: </label>338.10973