Berkson, Janet. <br/><br/>
AGRICOLA subject category code index 

 - [Beltsville, Md] :  National Agricultural Library,  1988 
 - 57 p. 
<br/><br/> 64-159 
<br/><br/><label>LCCN: </label>7192 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agricultura--Servicios de información.