Subject heading list, 

 - Washington, D. C:  National Agcicultural Library United States Dept,  1963. 
 - 2434p.:  ill.;  27cm. 
 -   vol.4 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Subject headings<br/>Agriculture
<br/><br/><label>LC Class. No.: </label>Z695.1.A4U4