Cooper, M. R.  1887- <br/><br/>
Progress of farm mechanization / 
by Martin R. Cooper, Glen T. Barton, and Albert P. Brodell. 
 - Washington, D.C. :  U.S. Dept. of Agriculture,  1947. 
 - 101 p. :  ill., maps ;  23 cm. 
 - Miscellaneous publication / United States Department of Agriculture ;  no. 630 .
 - Miscellaneous publication (United States. Department of Agriculture) ;  no. 630. .
<br/><br/> Contribution from Bureau of Agricultural Economics.  Cover title. 
<br/><br/><label>LCCN: </label>agr48000040  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agriculture--United States.<br/>Agricultural machinery.<br/>Agriculture--Economic aspects--United States.
<br/><br/><label>LC Class. No.: </label>S751  / .C6 
<br/><br/><label>National Agricultural Library Call No.: </label>1  / Ag84M no.630