Agricultural research service. 

 - Washington, D.C. :    U.S. Department of Agriculture,    1942- 
 - v. :    ill. ;    23 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Agriculture -- Periodicals.
<br/><br/><label>Dewey Class. No.: </label>PER 630.6173 U5