Duroet, Donald D. <br/><br/>
Changes in farm production and efficiency / 
Donald D. Duroet and Evelyn T. Black ; United States Department of Agriculture 
 - Washington, D.C. :  U.S. Agricultural Research Service, Production Economics Research Branch,  1978 
 - vi, 70 p. ;  25 cm. 
 - Statistical bulletin ;  no. 612 .
<br/><br/><label>ISSN: </label>0731-3217 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agriculture--United States--Statistics<br/>Agriculture--Economic aspects--United States--Statistics<br/>Agricultural productivity--United States--Statistics
<br/><br/><label>Dewey Class. No.: </label>338.10973021.